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E-mail: chloe.x@fybagcustom.com
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3
Size Groups
Any
Custom Dimension
±3mm
Production Tolerance
Real-Item
Fit Testing at Prototype
Why Custom Bag Size Matters for Brands
For Brands, “small”, “medium” and “large” are not enough.We also should to know: exact dimensions, capacity, and use scenario.
FY Bag Factory solid bag size strategy gives you:
- Clear positioning
- mini bag / small purse → impulse buy, gifting, trending item
- medium tote / everyday bag → core daily seller
- large bag / weekender duffle → high-ticket travel & storage piece
- Efficient development & sourcing
- Fewer pattern changes – reusable size blocks
- Consistent hardware and components across multiple SKUs
- Predictable costs
- Size directly impacts fabric consumption, shipping volume and retail price
- With a standard size chart, you can forecast cost and margin more accurately
- Better end-user experience
- A mini bag that really fits phone + card holder
- A medium tote that fits laptop and documents
- A travel bag or weekender duffle that works with airline cabin rules
FY Bag Factory is to translate your commercial goals into clear custom bag sizes and dimensions that work from design to production.
FY Bag Factory Three-Level Custom Bag Size System
We organize bags into three size groups — each with different target markets, use cases, and production economics. Click into any group for detailed dimensional specs and bag-type recommendations.
Mini & Small Bags (10–25 cm)
Clutches, card holders, cosmetic pouches, bum bags, mini crossbodies, favor pouches, phone bags. Accessories and add-ons — the entry tier of any bag collection. Highest volume per container. Lowest FOB per unit.
Medium Bags (25–45 cm)
Totes, handbags, standard crossbodies, lunch bags, school/commuter backpacks, diaper bags. The core tier — daily-carry bags that hold a laptop, a lunch, or a day’s essentials. Highest demand across all categories.
Large & Oversized Bags (45–70 cm)
Weekender duffles, gym bags, travel backpacks, large shopping totes, laundry bags. High-capacity carry — for overnight trips, gym sessions, and bulk shopping. Higher fabric usage = higher FOB; fewer units per container.
Size Reference by Bag Type
Standard dimension ranges for each bag type. These are starting points — we produce ANY custom dimension specified in your tech pack. All dimensions in cm (L × W × H) unless noted.
| Bag Type | Small | Standard | Large | Volume (L) | Key Constraint |
|---|---|---|---|---|---|
| Tote | 30×10×25 | 38×12×35 | 50×15×40 | 8–30L | Handle drop (shoulder vs hand carry) |
| Backpack | 28×12×38 | 32×15×45 | 35×20×52 | 13–36L | Laptop sleeve size (13″/15″/16″) |
| Crossbody | 14×5×18 | 22×8×16 | 30×10×22 | 1–7L | Strap drop (crossbody vs shoulder) |
| Duffle | 40×22×25 | 52×28×30 | 65×35×35 | 22–80L | Airline carry-on (55×40×20 max) |
| Handbag | 18×8×14 | 28×12×20 | 38×15×28 | 2–16L | Proportion (L:H ratio defines silhouette) |
| Makeup Bag | 15×5×10 | 22×8×14 | 28×12×18 | 0.5–6L | Flat-lay opening width |
| Lunch Bag | 18×12×14 | 24×15×20 | 30×20×25 | 3–15L | Insulation thickness (reduces internal volume) |
| Bum Bag | 18×5×10 | 25×8×14 | 32×10×18 | 1–6L | Waist belt max circumference |
Our Size Engineering & Verification Process
Getting the dimensions right isn’t just measuring with a ruler. It’s engineering the pattern, testing with real items, verifying under load, and maintaining tolerance across thousands of units.
±3mm
Production Dimension Tolerance
Real-Item
Fit Testing
at Prototype
CAD
Pattern Grading
Across Sizes
Yield
Fabric Utilization
Optimization
Dimension Engineering
- Pattern grading — when a bag comes in S/M/L, every pattern piece is scaled proportionally while maintaining structural integrity; strap lengths, pocket placements, and hardware positions all shift relative to body size
- Real-item fit testing — at prototype, we pack the bag with the ACTUAL items it’s designed to carry: a real 15″ laptop (not a ruler), real gym shoes (EU 44), real grocery items; this catches “it measures right but nothing fits” problems
- Loaded-shape verification — a bag’s dimensions change when packed. A 30L duffle that bulges to 40 cm depth when full won’t fit in an airline overhead bin. We measure both empty AND loaded dimensions
- Airline compliance check — for travel bags: we verify the bag fits within 55×40×20 cm (IATA standard) when packed to its intended capacity, not just when empty
Production Consistency & Cost Impact
- ±3mm tolerance — every bag measured at the QC station against the tech-pack dimensions; bags outside ±3mm on critical dimensions (laptop sleeve width, overall height) are flagged
- Fabric yield impact — a 10% increase in bag size can mean 15–20% more fabric per unit (non-linear: seam allowances and pattern waste increase disproportionately on larger bags)
- Shipping volume impact — larger bags = fewer units per carton = fewer bags per 20’/40′ container = higher shipping cost per unit. We calculate packed CBM (cubic meters) at the quoting stage so you can model landed cost
- Size labeling — dimensions printed on care labels, hang tags, and product listings (critical for Amazon where size-related returns are a top category)
Ready to build a clear size system for your bag collection?
Share your target categories (mini / small, medium, large / oversized), usage scenarios and budget.
Share your target categories (Our team will recommend custom bag sizes, dimensions and constructions tailored to your brand and market. / small, medium, large / oversized), usage scenarios and budget.
How to Plan Your Size Range
Offering one size per bag type is the simplest approach. But if your market spans multiple use cases, a tiered size range — S/M/L or specific-dimension variants — can capture a wider audience without redesigning the bag.
1
Start with the Contents — What Goes Inside?
Phone + wallet + keys → Mini/small 14–22 cm
Laptop (13″–16″) + files + lunch → Medium 32–45 cm
2
Check External Constraints
Airline carry-on → max 55×40×20 cm (IATA)
Venue clear-bag policy → often max 30×30×15 cm
Amazon “standard size” → longest side ≤ 45.72 cm (lower FBA fees)
Laptop sleeve → internal width must fit device + case (add 15–20mm clearance)
3
Decide: One Size or S/M/L Range?
One Size — simpler, lower MOQ
Best when the bag serves one clear use case (e.g., a 15″ laptop sleeve doesn’t need S/M/L). Lower inventory complexity, lower sampling cost.
S/M/L — wider market, more SKUs
Best when user needs vary (e.g., totes for quick errands vs full grocery runs). Requires pattern grading + per-size prototype. MOQ applies per size/color.
How to Choose the Right Bag Size?
Step 1 : Define the Use Case and Target Audience
First, clarify who will use the bag and how it will be used:
- A mini clutch for parties?
- A medium-sized work tote for professionals?
- A large duffel bag for weekend getaways?
- An oversized storage bag for home organization?
Step 2 : Translate into Size Requirements
We convert these needs into clear dimensions and capacity specifications:
- Internal size requirements (e.g., fits a 13-inch laptop or specific makeup set)
- External size constraints (e.g., airline cabin dimensions)
- Weight capacity and load requirements
Step 3 : Prototyping and Size Validation
We create samples and test:
- Actual item compatibility (laptops, bottles, diapers, makeup bags, etc.)
- Comfort levels for small/medium/large sizes when worn
- Visual proportion and alignment with brand identity
Step 4 : Final Sizing Chart and Mass Production
Upon confirming dimensions, we will:
- Finalize the bag sizing chart and specification parameters
- Standardize patterns for mass production
- Establish clear quality control tolerances for each custom size
Custom Bag Size — FAQ
Yes. We produce to any dimension specified in your tech pack. There’s no fixed size menu. The prototype is measured against your spec within ±3mm tolerance on critical dimensions. If you’re unsure about optimal dimensions, tell us what the bag needs to carry — we’ll recommend sizes based on real-item fit testing.
Directly — via fabric consumption. A 10% size increase can add 15–20% more fabric per unit (seam allowances and cutting waste scale disproportionately). Larger bags also use more hardware (longer zippers, wider straps) and take longer on the sewing line. We calculate size-adjusted FOB at the quoting stage.
Rough ranges for a 20′ container: Mini/small bags (pouches, wallets): 15,000–30,000 pcs. Medium bags (totes, backpacks): 4,000–10,000 pcs. Large bags (duffles, weekenders): 2,000–5,000 pcs. Actual count depends on bag shape, packaging tier, and whether bags are flat-packed or filled. We provide the CBM estimate and container load plan at quoting.
We regularly produce bags up to 70 cm in the longest dimension (weekender duffles, large storage bags). Larger formats (garment bags, ski bags, surfboard covers) are possible but should be discussed — they may require specialized sewing equipment or wider-than-standard fabric rolls.
Amazon FBA classifies products by package dimensions — “standard size” (longest side ≤ 45.72 cm) has lower fulfillment fees than “oversize.” We design and package bags to fit within standard-size thresholds where possible — for example, flat-packing a tote to reduce the longest dimension. If the bag inherently exceeds standard size, we flag the oversize classification and its fee impact at the design stage.
Yes. We can create EU / US / Asia versions with slight size adjustments while sharing the same design.
Yes. Give us your target category (handbag, tote, backpack, travel bag, storage bag) and budget. We’ll propose custom bag sizes, materials and structures.
Ready to Define Your Bag Dimensions?
Tell us the bag type, what it needs to carry (laptop size, gym shoes, grocery volume), and any external constraints (airline limits, Amazon standard-size thresholds). We’ll recommend optimal dimensions, test with real items at prototype, and verify ±3mm tolerance across production.