From Sketches to Samples: A Comprehensive Guide to the Factory Prototyping Process (Including Cost Calculations)

Who this guide is for: brand founders, product developers, sourcing managers, freelance designers, DTC entrepreneurs, and anyone who has a handbag design and needs to understand exactly what happens inside a factory between the moment you send a sketch and the moment a finished prototype arrives at your door. If you want to know how pattern making works, what determines sample cost, how to reduce revision cycles, and what a realistic timeline looks like — with real numbers, not marketing estimates — this guide walks you through every stage of the prototyping process from the manufacturer’s side of the table.

The prototype is the most important object in the entire handbag development process. It is more important than the tech pack (which is an instruction, not a product). It is more important than the bulk production order (which is a replication of the prototype). The prototype is the first physical translation of an idea into a three-dimensional object that can be held, opened, carried, photographed, and judged. If the prototype is right, everything that follows is replication. If the prototype is wrong, everything that follows amplifies the error.

Yet for most brand founders and designers, the prototyping process is a black box. You send a sketch and some material preferences. Weeks pass. A box arrives. Inside is either a bag that matches your vision or a bag that does not — and you are not entirely sure why either outcome occurred, or what you could have done differently to influence the result.

This guide opens the black box. It documents the seven stages of factory prototyping in the order they actually happen, explains what determines the cost of each stage, identifies the five most common reasons prototypes fail (and how to prevent each one), and provides the cost calculation formulas that factories use internally — so you can estimate your sampling investment before contacting a single manufacturer.

The Seven Stages of Factory Prototyping

Every handbag prototype passes through seven sequential stages. Understanding the sequence — and what can go wrong at each stage — gives you the ability to provide the right inputs at the right moment and catch problems before they become expensive.

Stage Overview

Stage	What Happens	Duration	Your Role	Factory’s Role
1. Brief interpretation	Factory reviews your tech pack, sketches, or reference images and confirms feasibility	1–2 days	Provide the clearest possible brief	Ask clarifying questions; identify potential issues
2. Pattern development	A pattern maker creates the flat paper or digital patterns for every panel of the bag	1–3 days	Review pattern drawings if provided; confirm dimensions	Draft, adjust, and finalize the cutting patterns
3. Material preparation	Factory selects, cuts, and prepares the materials specified for the prototype	1–2 days	Confirm material choices; approve swatches if not pre-approved	Source, cut, prepare materials; apply interlining or treatment
4. Construction	Sewing team assembles the prototype following the pattern and tech pack	2–4 days	Wait (no input needed during construction)	Cut, sew, install hardware, attach lining, finish edges
5. Finishing and QC	Factory inspects the finished prototype against the tech pack; applies branding	1 day	Wait	Internal QC, branding application, photography
6. Shipping	Prototype is packed and shipped to you	3–7 days (express international)	Provide shipping address; choose carrier	Pack, label, ship, provide tracking
7. Review and feedback	You evaluate the prototype and provide revision notes	1–5 days (your time)	Inspect thoroughly; provide detailed written + photo feedback	Wait for your feedback; prepare for revision if needed
Total		10–24 days (production + shipping; excluding your review time)

Stage 1: Brief Interpretation — Where Clarity Saves Weeks

The factory’s first action upon receiving your design is not to start cutting material — it is to interpret your brief. A pattern maker, a production manager, and sometimes a designer review your tech pack, sketches, and reference images to understand what you want and identify anything that is unclear, contradictory, or physically impossible.

What the Factory Evaluates in Your Brief

Evaluation Point	What They Look For	Common Problem	How to Prevent It
Dimensional feasibility	Can the specified dimensions physically work with the specified features?	“A 25 cm wide bag with a 14″ laptop compartment” — the laptop is wider than the bag	Measure your own items; verify that your specified dimensions fit everything you claim they will
Material-to-construction compatibility	Can the specified material be sewn, folded, and finished in the way the design requires?	“Debossed logo on ripstop nylon” — nylon does not hold debossing; PU or leather is needed	Ask the factory which materials work for your desired techniques before finalizing
Hardware availability	Are the specified hardware pieces available, or do they require custom tooling?	“Logo-engraved magnetic snap in antique brass” — this requires a custom die that adds 2 weeks and 200	Specify standard hardware for prototypes; custom hardware for production
Construction sequence	Can the bag be assembled in the order the pattern implies?	A lining pocket that must be sewn after the main body is closed — physically impossible without ripping a seam	Trust the factory’s construction expertise; they may resequence your design for producibility
Cost alignment	Does the design match the budget the client has indicated?	Client expects $15 FOB but specifies genuine leather + custom hardware + 6 compartments	Be honest about your budget range upfront; the factory can suggest alternatives that hit your price target

What to Send for the Strongest Possible Brief

Document	Minimum Viable	Ideal
Exterior sketch	Hand-drawn front + back view with basic dimensions	Digital drawing with front, back, side, top, and bottom views; all dimensions labeled in cm
Interior layout	Written description of pockets and compartments	Sketch of interior showing pocket positions, types (zip, slip, padded), and sizes
Material specification	“Pebbled PU leather, similar to [reference photo]”	Pantone color reference + material type + texture name + physical swatch if available
Hardware specification	“Gold zippers, magnetic snap closure”	Specific hardware type, size, finish, and function for every piece (main zip, pocket zip, closure, D-rings, feet)
Logo and branding	Logo file (any format) + “debossed on front”	Vector logo file (.AI or .EPS) + exact placement coordinates + technique + size in mm
Reference images	2–3 photos of existing bags showing elements you like	5–10 annotated photos: “shape of Bag A, handles of Bag B, closure of Bag C, color of Bag D”

The quality of your brief directly determines the quality of the first prototype. A vague brief produces a prototype that requires 2–3 revisions to get right. A detailed brief produces a prototype that requires 0–1 revisions. Each revision cycle costs 5–10 days and 100. Investing 2–3 hours in a thorough brief saves 300 and 2–4 weeks.

Stage 2: Pattern Development — The Blueprint of Every Bag

Pattern making is the stage where a three-dimensional bag design is translated into flat two-dimensional pieces that can be cut from material and sewn together to create the intended shape. It is the most skilled, most intellectually demanding step in the entire process — and the one most invisible to clients.

What a Pattern Maker Does

A pattern maker takes your sketch (a picture of the finished product) and reverse-engineers it into the set of flat pieces that, when cut and sewn, will produce that shape. This involves:

• Calculating seam allowances — every edge that will be sewn loses 8–12 mm to the seam. The pattern piece must be larger than the finished dimension by exactly this amount.
• Accounting for material thickness — thicker materials (genuine leather, heavy canvas) behave differently at seams and corners than thin materials (PU, nylon). Pattern pieces for thick materials must be adjusted to prevent bulking.
• Engineering curves and darts — a bag that looks rounded or tapered in your sketch requires precisely calculated curves in the flat pattern. A 1 mm error in a curve produces a visible distortion in the finished bag.
• Designing the gusset — the side panel that gives the bag its depth. Gusset patterns are some of the most complex because they must wrap around corners while maintaining consistent width.
• Planning the construction sequence — the order in which pieces are sewn together. Some sequences are impossible (you cannot sew a lining pocket after closing the body); the pattern must account for assembly order.

Pattern Development Methods

Method	How It Works	Accuracy	Speed	Cost	Best For
Manual pattern drafting	Pattern maker draws on paper by hand using rulers, curves, and experience	Good — depends on maker’s skill	Moderate (1–3 days)	Lowest	Simple designs; factories with experienced craftspeople
CAD pattern drafting	Pattern maker uses software (Gerber, Optitex, Lectra, or similar) to create digital patterns	Very good — mathematical precision, easy to adjust	Fast (0.5–2 days)	Moderate	Complex designs; designs requiring precise symmetry
3D digital prototyping	Designer creates a 3D model of the bag in software; the software generates flat patterns from the 3D shape	Very high — the pattern is derived directly from the intended 3D form	Fastest for the pattern (hours); but requires 3D modeling skill	Highest (software + skill)	Brands with digital design capability; complex or organic shapes

3D Digital Prototyping: What It Can and Cannot Do

3D digital prototyping (using tools like CLO3D, Browzwear, or Rhino) has become a significant topic in handbag development. It offers real advantages — but it does not replace physical prototyping. Here is an honest assessment:

Capability	What 3D Prototyping Does Well	What It Does Not Do
Shape visualization	Renders the bag in 3D from any angle; helps client visualize before cutting material	Does not simulate the exact drape, weight, and hand-feel of physical materials
Color and material simulation	Shows how different materials and colors will look on the shape	Color accuracy depends on screen calibration; texture simulation is approximate
Pattern generation	Automatically generates flat patterns from the 3D model	Generated patterns often need manual adjustment for producibility
Proportion testing	Quickly test different dimension ratios before committing to physical material	Does not account for material thickness, stiffness, or real-world sewing behavior
Client communication	A rendered image is easier for a non-designer client to evaluate than a flat sketch	Client may approve a render that cannot be produced exactly as shown
Physical prototype replacement?	No — 3D prototyping is a pre-prototype visualization tool, not a replacement for a physical sample	You still need a physical prototype to evaluate construction, tactile quality, hardware function, and real-world usability

The honest recommendation: use 3D prototyping if your factory or designer offers it as a pre-prototype step. It catches proportion errors, color mismatches, and layout issues before material is cut — saving one revision cycle (5–10 days and 100). But do not skip the physical prototype based on a 3D render that “looks right.” The render cannot tell you how the zipper feels, whether the handle is comfortable, or whether the bag holds its shape when loaded.

Stage 3: Material Preparation — Cutting With Precision

Once patterns are finalized, the factory prepares the materials: selecting the correct swatch from the approved reference, applying any required treatments (interlining, coating, pre-washing), and cutting the pattern pieces.

Material Preparation Steps

Step	What Happens	Critical Detail
Material selection	Factory pulls the approved material from in-stock inventory or receives the custom-ordered material	Must match the approved swatch exactly — check under daylight and artificial light
Interlining application	For structured bags, a fusible interlining is ironed onto the back of body panels before cutting	Interlining weight and type affect the bag’s stiffness; specify “light,” “medium,” or “heavy”
Marking and cutting	Pattern pieces are laid onto the material and cut using manual shears or a die-cutting machine	Grain direction must be consistent across all visible panels — mismatched grain creates color variation
Edge preparation	Cut edges are either left raw (for internal seams) or pre-treated (painted, folded, or sealed) before sewing	For PU leather: edge painting or folding. For canvas: binding or serging. For nylon: heat-sealing
Hardware preparation	Zippers cut to length; snap components sorted; D-rings, feet, and rivets counted	All hardware should match the finish specified — mixing gold and “slightly different gold” from different batches is visible

The Grain Direction Rule

Every material has a grain — a directional quality created by the weave (fabric) or the embossing pattern (PU leather). When light hits the surface, grain direction affects the shade: panels cut in the same grain direction look identical; panels cut in different grain directions look like slightly different colors.

For prototypes — and for bulk production — all visible panels (front, back, flap, gussets) must be cut with the same grain direction. Specify this explicitly in your tech pack: “All exterior panels: same grain direction.” It is a standard practice at quality factories, but not universal — and omitting it leaves room for error.

Stage 4: Construction — Sewing the Prototype

This is the stage where flat pieces become a three-dimensional bag. A skilled sample sewer — often the factory’s most experienced craftsperson — assembles the prototype by hand and machine, following the pattern and tech pack.

The Construction Sequence (Typical for a Structured Tote)

Step	Operation	Time (approx.)	Notes
1	Sew interior pockets to lining panels	15–25 min	Pockets must be positioned before lining is assembled
2	Assemble lining body (front + back + gussets)	15–20 min	Lining is a complete bag inside the bag
3	Attach interlining to exterior panels (if not already fused)	10–15 min	Structural reinforcement layer
4	Sew exterior panels together (front + back + gussets + base)	25–40 min	The bag takes shape; seam alignment is critical
5	Install zipper (main compartment)	10–20 min	Zipper tape must align perfectly with the opening width
6	Attach hardware (D-rings, feet, magnetic snaps, turn-locks)	15–25 min	Each piece is riveted or screw-posted through reinforced layers
7	Insert lining into exterior body	10–15 min	Lining is turned and positioned inside the exterior shell
8	Attach top binding or turn-and-stitch the top edge	15–20 min	This finishes the bag opening; clean binding or turned edge signals quality
9	Attach handles (riveted + stitched)	10–15 min	Handles must be symmetrical and centered
10	Attach shoulder strap hardware (if applicable)	5–10 min	Swivel hooks, strap adjusters
11	Apply branding (debossing, foil, label)	5–15 min	Last step before final inspection
12	Final trim and clean	10 min	Thread trimming, surface cleaning, sticker removal
Total construction time		2.5–4 hours per prototype	Bulk production is faster due to assembly-line specialization

Why Prototypes Take Longer Than Bulk Units

A common client question: “If the prototype takes 3–4 hours, why does bulk production take 25–35 days for 200 bags?” The answer: in bulk production, each worker performs ONE operation repeatedly (one person sews pockets, another attaches zippers, another installs hardware). Each operation takes 2–5 minutes. On a line of 15–20 workers, a bag completes assembly in 30–45 minutes — roughly 5× faster than a prototype where one person does everything.

The prototype sewer does every operation herself, including figuring out the optimal sequence, testing stitch tension on the actual material, and checking dimensions at each stage. The prototype is where the factory develops the production method — the bulk run simply replicates it.

Stage 5: Finishing and QC — The Factory’s Self-Check

Before shipping the prototype to you, the factory’s QC team inspects it against your tech pack. A quality factory performs this self-check rigorously; a careless factory ships whatever came off the sewing table.

Factory QC Checklist for Prototypes

Check	What They Measure	Tool	Pass Criteria
Overall dimensions	Width, height, depth	Tape measure	±5 mm of specification (prototype tolerance is wider than bulk)
Symmetry	Left-right balance of handles, pockets, hardware	Visual + measure	Handles within ±3 mm of center; pockets mirror within ±2 mm
Stitching quality	Stitch length, straightness, consistency, no loose threads	Visual + ruler	3–4 mm stitch length (unless specified otherwise); straight lines; no skipped stitches
Hardware function	Zippers, closures, snaps, turn-locks	Manual operation	Smooth operation; zippers glide without catching; magnetics engage cleanly
Material quality	Surface consistency, no scratches, no dye transfer, no peeling	Visual + touch	No defects visible under normal lighting at arm’s length
Logo/branding	Position, size, depth, clarity	Visual + measure	Matches specification; centered where specified; no smearing or misalignment
Color accuracy	Material color vs. approved swatch	Visual under daylight	Acceptable match — note that prototype tolerance is wider than bulk
Interior	Lining smooth, pockets functional, no exposed raw edges	Visual + function	Clean finish; all pockets accessible; no raw or fraying edges
Weight	Empty weight of the finished prototype	Scale	Within ±50 g of target (if weight target was specified)

Stage 6: Shipping — Getting the Prototype to You

Shipping Method	Transit Time	Cost (single prototype, China to U.S.)	Tracking	Best For
DHL Express	3–5 business days	60	Full tracking, door-to-door	Standard — recommended for most prototypes
FedEx International Priority	3–5 business days	65	Full tracking	Alternative to DHL
EMS (China Post Express)	7–14 days	30	Basic tracking	Budget option when time is not critical
Regular airmail	14–30 days	15	Limited tracking	Not recommended — too slow, risk of loss

Standard recommendation: DHL or FedEx Express. The 60 cost is worth the 3–5 day delivery and full tracking. Waiting 2+ weeks for a prototype via economy shipping wastes more in lost development time than the 40 saved on shipping.

Stage 7: Review and Feedback — Your Most Important Contribution

The prototype review is where your expertise matters most. The factory has done its best to interpret your brief — now you evaluate whether the interpretation matches your vision.

The Three-Pass Review Method

Pass 1 — First Impression (30 seconds). Before measuring anything, hold the bag at arm’s length and answer one question: “Does this look right?” Your gut reaction captures proportion, color, and overall feel more accurately than any measurement. Note your first impression before analyzing details.

Pass 2 — Technical Check (30–60 minutes). Use the QC checklist from Stage 5 to measure and evaluate every specification. Document every deviation in writing AND with annotated photographs (circle the problem area, add a note explaining what is wrong and what it should be).

Pass 3 — Functional Test (15–30 minutes). Load the bag with the items it is designed to hold (laptop, wallet, phone, bottles, etc.). Carry it for 10 minutes. Open and close every pocket, zipper, and closure 10 times. Does the bag work as intended? Are any pockets too small? Are any closures too stiff or too loose? Does the bag hold its shape under load?

How to Write Effective Revision Notes

Do	Do Not
“Handle drop length is 23 cm; please adjust to 26 cm”	“Handles are too short” (too short by how much?)
“Front pocket zipper is 2 cm to the left of center — please center it” (include a photo with markup)	“Pocket is off-center” (which direction? by how much?)
“Material color is too warm/yellow compared to Pantone 7541C — please shift toward a cooler gray”	“Wrong color” (what specifically is wrong about it?)
“Magnetic snap closure force is too strong — I can barely open it with one hand. Please reduce magnet strength”	“Closure is hard to open” (is it the mechanism, the force, or the alignment?)

Every revision note should contain three elements: what is wrong + what it should be + a photo showing the issue. The factory will execute your revisions most accurately when they can see both the problem and the solution.

Sample Cost Calculation: The Real Numbers

Sample cost is one of the most frequently asked — and most frequently misquoted — questions in handbag development. The true cost depends on a formula with several variables.

The Sample Cost Formula

Sample Cost = Material Cost + Labor Cost + Hardware Cost + Branding Cost + Overhead/Margin + Shipping

Cost Breakdown by Bag Complexity

Cost Component	Simple Bag (canvas tote, no hardware)	Standard Bag (PU leather, zip, pockets, hardware)	Complex Bag (multi-compartment, custom hardware, special features)
Material	10	18	35
Labor (3–6 hours of skilled sample sewer time)	25	45	80
Hardware	3	8	20
Branding (debossing die or logo application)	5	15	25
Factory overhead + margin (30–50% of direct costs)	13	26	48
Subtotal (FOB, before shipping)	56	112	208
Express shipping to U.S.	60	60	65
Total cost to receive one prototype	116	172	273

Why Sample Prices Vary So Much Between Factories

Factory Type	Sample Price Range	Why This Price
Factory subsidizing samples to win bulk orders	60 (below actual cost)	They absorb the loss expecting to recoup on bulk production.
Factory charging fair cost recovery	150 (at or near actual cost)	They charge what it actually costs to produce a one-off prototype. Most honest pricing; best quality motivation
Factory charging a premium for samples	300+ (above cost, includes profit margin)	They treat sampling as a service with its own margin. Often the highest-quality samples; the price filters out non-serious inquiries
Factory offering “free samples”	$0 (factory absorbs 100%)	Retain customers by offering free samples to secure future business. This typically requires a special approval process.

Is the Sample Cost Refundable?

Many factories offer sample cost refunds — but the terms vary:

Refund Policy	What It Means	How Common
Fully refundable against bulk order	100% of sample cost deducted from your first production invoice	Common — the most buyer-friendly policy
Partially refundable	50% of sample cost deducted from first bulk order	Common — factory recovers some sample cost
Non-refundable, but tooling is retained	Sample cost is not refunded, but any dies or molds created are kept for your future use	Less common — applies when custom tooling is involved
Non-refundable	Sample cost is a standalone fee; no deduction from bulk	Common at premium factories and for complex samples

Recommendation: ask about the refund policy before ordering samples, but do not make it a deal-breaker. The most important factor is sample quality, not sample cost. A 50 sample that requires three revisions.

How to Reduce Revision Cycles (And Save Weeks)

Every revision cycle adds 5–12 days (factory production + shipping) and 100 (labor + shipping) to your development timeline. Reducing revisions from three to one saves 10–24 days and 200. Here is how:

Five Practices That Minimize Revisions

Practice	What It Prevents	Time Saved
1. Send a complete, detailed tech pack (see Stage 1 “ideal” column)	Misinterpretation of your intent	5–10 days (one full revision cycle)
2. Approve materials via physical swatch before sample production	Color and texture mismatches in the finished prototype	5–10 days
3. Specify standard hardware for prototypes; save custom hardware for bulk	Hardware-sourcing delays that push back sample delivery	3–7 days
4. Include a reference bag (send the factory a competitor’s bag that shows the quality and construction level you expect)	Quality expectation mismatch — the factory produces to a different standard than you imagined	5–10 days
5. Request a photo review before shipping	Factory photographs the finished prototype and sends images for your initial feedback before incurring shipping cost	60 in shipping (if photos reveal a major issue, the factory can revise before shipping)

The photo review before shipping is one of the most under-used practices in handbag sampling. Ask your factory to send 8–10 photos (front, back, sides, top, bottom, interior, hardware close-up, logo close-up) before they ship the prototype. If you spot a major issue (wrong color, mispositioned logo, incorrect hardware), the factory can fix it before you pay 60 for express shipping on a prototype you would have rejected.

The Complete Prototyping Timeline: Realistic, Not Optimistic

Stage	Best Case	Typical	Worst Case
Brief interpretation	1 day	1–2 days	3–5 days (if clarification needed)
Pattern development	1 day	1–3 days	5–7 days (complex or organic shapes)
Material preparation	0.5 day	1–2 days	5–10 days (if custom material must be ordered)
Construction	1.5 days	2–4 days	5–7 days (complex multi-compartment)
Finishing + QC	0.5 day	1 day	1–2 days
Shipping (express)	3 days	3–5 days	5–7 days
Subtotal (first prototype)	7 days	10–17 days	24–38 days
Your review + feedback	1 day	2–5 days	7–14 days
Revision sample (if needed)	5–10 days	7–12 days	14–21 days
Total to final approved sample	8–13 days (if no revision needed)	19–34 days (one revision)	45–73 days (two revisions)

The single biggest variable is whether you need revisions — and the single biggest determinant of revision count is the quality of your initial brief. Invest time in the brief; save weeks in the timeline.

How FYBagCustom Supports the Prototyping Process

FYBagCustom is Your Trusted Custom Bag Manufacturer in China, with 15+ years of prototyping and sample development experience across all bag types. For designers, founders, and brands at the prototype stage, our capabilities include:

• CAD and manual pattern development — our pattern team develops flat patterns from your tech packs, sketches, reference images, or reference bags using both digital CAD tools and traditional hand-drafting.
• 3D visualization support — for complex designs, we provide 3D renders showing the intended bag from multiple angles before cutting material, reducing misinterpretation risk.
• Rapid sampling in 5–7 days — proto samples produced and ready for shipping within 5–7 days of brief approval for standard constructions (7–12 days for complex multi-compartment or specialty-material bags).
• In-stock material library — 50+ PU leather colors, nylon variants, canvas weights, and standard hardware finishes available on-hand, eliminating material-sourcing delays during sampling.
• Photo review before shipping — we send 8–10 high-resolution photographs of the completed prototype for your review before incurring express shipping cost.
• One free revision included with most sample orders — your first revision sample is produced at no additional charge (additional revisions at reduced cost).
• Sample cost refundable against bulk — prototype costs are deducted from your first production order invoice.
• Express shipping — DHL and FedEx Express options for 3–5 day international delivery with full tracking.
• Design consultation at no extra charge — our development team reviews your brief, identifies potential issues, recommends material and hardware alternatives, and suggests construction optimizations before the first cut.
• Pattern storage — once developed, your patterns are stored digitally and physically for future reorders and variations at no ongoing cost.

Our 50,000 m² factory in Guangzhou with dedicated sample rooms, experienced pattern makers, and 500+ professional staff produces prototypes for first-time founders, established brands, freelance designers, and product development agencies across international markets.

Summary: The Prototype Is Not a Formality — It Is the Foundation

The prototyping process is where your handbag brand is built or broken. A good prototype — produced from a clear brief, evaluated thoroughly, and revised precisely — becomes the locked reference that ensures every bag in your bulk production matches the quality you approved. A rushed or carelessly reviewed prototype becomes the locked reference for a production run of bags that disappoint. For designers and founders at the prototyping stage, three core takeaways:

1. Invest in the brief to save on revisions. A detailed tech pack with dimensioned sketches, material swatches, hardware specifications, and annotated reference photos reduces average revision cycles from 2–3 to 0–1. Each avoided revision saves 5–12 days and 100. The 2–3 hours spent on a thorough brief is the highest-ROI time investment in the entire development process.
2. Sample cost is 273 depending on complexity — and it is the most important money you spend. The prototype is not a cost to minimize; it is an investment in getting the product right before committing 10,000 to bulk production. Choose your factory on sample quality, not sample price.
3. Use the three-pass review method. First impression (30 seconds, gut reaction). Technical check (30–60 minutes, measurements and details). Functional test (15–30 minutes, loaded and carried). Document everything with written notes AND annotated photos. The precision of your feedback determines the precision of the revision.

If you have a handbag design ready for prototyping — whether it is a polished tech pack or a sketch on the back of a napkin — contact FYBagCustom to start the development process. Send us your brief and we will respond with a feasibility assessment, material recommendations, and a sample quotation, typically within 48 hours. The prototype is where your brand becomes real. Let us help you get it right the first time.