Tel/WhatsAapp:+86 13366396425
E-mail: chloe_xia@vleap.com.cn
Years Manufacturing
Factory Area
Professional Staff
Inspection Rate
Medium bags serve the broadest buyer base of any size tier — every brand, every channel, every market segment. Commuter brands, fashion labels, travel companies, Amazon FBA sellers, corporate buyers, and promotional distributors all order medium bags as their core product tier.





Mini bags get returned because they’re smaller than expected. Oversized bags get returned because they’re too bulky for daily use. Medium bags match what buyers mentally picture when they think “bag.” Five commercial dynamics make medium the most reliable size tier for B2B buyers.

Medium bags match the mental image buyers have when they purchase online. No “it’s smaller than I thought” surprise (the #1 mini bag complaint). No “it’s too big for my needs” regret (the #1 oversized bag complaint). Size alignment reduces returns by 20–30% vs. extreme size tiers.

Medium bags sell steadily — not in seasonal bursts. They’re not trend-driven like mini bags or occasion-specific like oversized travel bags. Daily-use bags are consumed year-round, and when buyers find a medium bag that sells, they reorder quarterly. The most predictable revenue stream for B2B buyers.

At medium size, every bag looks roughly similar — the silhouette is familiar. This is the size tier where multi-function, convertible, waterproof, and textured design features have the highest commercial impact. Features — not size — differentiate medium bags on the shelf and in search results.

Medium bags sit in the personal-item sweet spot for airline travel — most carriers allow under-seat items up to approximately 45 × 35 × 20 cm. Medium totes and backpacks designed to fit under the seat are a massive travel-accessories segment. The compliance constraint creates a defined, targetable market.
Medium is the default size for every bag type in our catalog. These are the eight most-ordered formats in the 25–40 cm range — the sizes that account for the majority of our production volume.

The everyday crossbody. Phone + wallet + keys + small cosmetics. Adjustable strap. The #1 selling bag silhouette in the medium size tier. PU leather, nylon, or canvas. Fashion, travel, and daily commute.

The standard work and shopping tote. Fits 13″ laptop, tablet, wallet, water bottle, and daily essentials. Open-top or zip closure. Canvas, nylon, leather, or non-woven. The most versatile medium format.

The casual everyday shoulder bag — hobo, flap, or slouchy format. Generous capacity with relaxed silhouette. PU leather, canvas, or nylon. Fashion and lifestyle positioning.

The standard diaper bag — backpack or tote format with multi-function compartments. Insulated bottle pockets, changing pad, stroller straps. The most feature-dense medium bag format.
“Cotton bag” covers dozens of different fabrics. The weave type determines the bag’s drape, structure, printability, and price tier. Choosing the right weave is the first sourcing decision — and the one most first-time buyers get wrong.
Crossbody
W 22–28 cm
Width 22–28cm × Height 15–20cm × Depth 6–10cm. Fits phone (up to Pro Max with case), slim wallet, keys, lip balm, and earbuds. The globally best-selling crossbody size. Adjustable strap 60–130cm.
Tote
W 30–40 cm
Width 30–40cm × Height 28–35cm × Depth 10–15cm. Fits 13″ laptop, tablet, water bottle, wallet, cosmetics pouch, and book/notebook. The universal medium tote — work, school, shopping, travel.
Backpack
H 38–45 cm
Height 38–45cm × Width 28–33cm × Depth 13–18cm. 20–30L. Fits 15.6″ laptop, tablet, water bottle, change of clothes, and daily essentials. Airline personal-item compliant at lower end.
Handbag
W 25–33 cm
Width 25–33cm × Height 18–25cm × Depth 10–14cm. Fits wallet, phone, sunglasses, cosmetics pouch, and keys. The standard women’s handbag — structured, proportional, day-to-evening versatile.
Duffle
L 45–55 cm
Length 45–55cm × Height 25–30cm × Depth 22–28cm. 30–45L. Fits 2–3 days of clothing, shoes (in separate compartment), toiletries, and electronics. The standard gym and weekend-trip duffle.

Airline personal-item policies create a hard dimensional ceiling that defines the medium-bag market for travel accessories. Most carriers allow a personal item that fits under the seat ahead — typically 45 × 35 × 20 cm or smaller. Medium bags designed to this constraint are a massive, growing product segment driven by low-cost carrier growth and carry-on-only travel culture.
We produce personal-item-compliant medium bags across backpack, tote, and crossbody silhouettes — verified against airline dimension policies at the sampling stage.
Typical Limits
Most major airlines allow personal items approximately 45 × 35 × 20 cm (18 × 14 × 8 inches). Policies vary by carrier — some specify smaller limits, some don’t enforce strictly. We recommend designing to 43 × 33 × 18 cm as a safe universal-compliance target that passes on virtually all carriers including budget airlines with strict enforcement.
Why It Matters
Low-cost carriers charge $30–60 for carry-on overhead bags. A personal item that fits under the seat is the only bag that flies free on many airlines. This economic incentive drives consumer demand for bags explicitly designed and marketed as “personal-item size” or “under-seat bag” — a growing search category on Amazon.
Backpack Format
The #1 personal-item format. Medium backpack at 40–43cm tall × 30–33cm wide × 15–18cm deep. Padded laptop compartment (13″–15.6″). Trolley sleeve for luggage stacking. Multi-function features (USB port, organizer, water-bottle pocket) differentiate at this standardized size. The highest-growth personal-item segment.
Tote Format
The personal-item tote. Medium tote at 40 × 33 × 15cm. Top-zip closure (mandatory for under-seat use — open-top totes don’t work). Structured enough to stand upright under the seat. Often convertible with backpack straps for airport carry. For women travelers and professional commuters.
Design Constraints
Under-seat bags must compress or flex to fit irregular under-seat spaces (varying by aircraft type). Rigid bags risk not fitting. We recommend soft-structured construction with flexible gussets that allow the bag to compress by 2–3 cm in depth. External water-bottle pockets must fold flat when empty — extended pockets add to measured depth.
Marketing Claim
“Airline personal-item compliant” is a high-converting claim on Amazon and travel-accessories sites. We verify dimensional compliance at the sampling stage and provide exact measurements for your listing. For buyers who want formal compliance, we can provide dimensional-verification documentation per batch. Note: no universal “certification” exists — compliance is self-declared based on airline policies.
Medium bags are our highest-volume production tier — optimized for cost-efficiency, fast turnaround, and consistent quality at scale. In-house design, cutting, sewing, hardware installation, and QC. 10+ production lines. Sample turnaround in 5–7 days.
Free Add-on: Professional Product Photography Included
Free product photos in use-context scenarios (commute, office, airport, café) plus scale-reference shots showing the bag next to common items (laptop, water bottle, phone) — essential for online listings.
Medium bags use the full breadth of our material and design-feature catalog — every fabric, every hardware option, and every design feature is available at medium scale. Medium is the size tier with the widest customization palette.




FY Bag Custom operates its own vertically integrated factory in Guangzhou, Guangdong — design, cutting, sewing, hardware installation, and QC all under one roof. Medium bags are our core production volume — the size tier where our 10+ production lines are most optimized for throughput, cost-efficiency, and quality consistency.
Because medium is our highest-volume tier, our sourcing, cutting, and sewing workflows are tuned for maximum efficiency at medium dimensions. Material yield is highest (less waste per panel), cutting batches are largest, and QC is most standardized. For buyers, this translates to the fastest lead times and most competitive pricing of any size tier.
Years in Manufacturing
Factory Floor Area
Professional Staff
Production Lines
Monthly Capacity
Pre-Shipment Inspection
Medium bags follow our standard 6-stage QC protocol — the same rigorous inspection applied to every bag we produce. Medium-specific QC emphasis: dimensional consistency across large batches, hardware function on every unit, and airline-compliance dimensional verification on travel-oriented products. Third-party inspections (SGS, BV, TUV) welcome.

Fabric weight, color, and hand feel verified against approved swatch. Hardware components inspected for plating quality and function. Insulation, lining, and specialty materials checked per spec. Rejected materials isolated before cutting.

PPS delivered in 5–7 days. Dimensional accuracy verified. All features function-tested. Airline compliance measured (if applicable). Mass production starts only after your written sign-off.

Panel dimensions verified per batch against cutting template. Consistent sizing across 100+ unit batches — medium bags ship in large quantities where batch consistency is critical. Stitching, hardware installation, and lining assembly inspected in-line.

USB port tested (if applicable). Insulation leak-tested (if applicable). Waterproof seams tested (if applicable). Convertible mechanism cycle-tested (if applicable). Hardware pull-tested. Every design-feature layer gets its own QC protocol.

Every finished medium bag inspected one by one — fabric surface, stitch quality, hardware function, lining, zipper, branding placement, and overall dimensions. Not sampled, not skipped.

Individually polybag-packed or tissue-stuffed per spec. Carton counts, seal numbers, and shipping marks documented. Container loading photos and videos sent within 24 hours.
Medium bags have the fastest and most efficient production cycles of any size tier — our lines are optimized for medium dimensions. Sample in 5–7 days, bulk in 20–30 days for standard construction. Add 5–10 days for multi-function, convertible, or waterproof features.

Day 1–2
Send tech pack or reference; FOB quote in 24 hours.

Day 3–10
Prototype in 5–7 days via DHL.

Day 11–13
30% T/T deposit; balance before shipment.

Day 14–40
Daily WIP photos including print-run documentation.

Day 41–45
100% inspection plus loading documentation.

Day 46–55
Sea, air, express, or direct-to-FBA.
Sample Lead Time
5–7 Days
Mass Production
25–35 Days
Payment Terms
30% T/T · 70% Before Shipment
Shipping Terms
FOB · CIF · DDP · Amazon FBA
Medium bags account for the majority of our production volume. Over the past 15+ years, FY has manufactured medium bags for fashion brands, travel companies, Amazon FBA sellers, and corporate buyers worldwide.
OEM production of a medium multi-function backpack (42 × 30 × 17cm) — airline personal-item compliant. USB port, padded 15.6″ laptop compartment, trolley sleeve, anti-theft back pocket, water-bottle pocket. 600D Oxford, water-resistant coated. 4 colorways. Dimensional compliance verified at sampling. FOB to US. Retail $40–55. Quarterly reorders.
ODM partnership on saffiano-textured PU leather medium tote (35 × 28 × 12cm) with padded 13″ laptop sleeve, magnetic snap closure, and detachable crossbody strap. 6 colorways. FNSKU labeling, Amazon packaging, lifestyle photography. Ranked top 30 in “work tote bag” within 45 days.
Branded medium canvas tote (35 × 30 × 10cm) with screen-printed company logo for annual conference. 12oz canvas, snap closure, interior zip pocket. Delivered CIF in 22 days. Under $4.00/pc at volume. Reordered annually with updated artwork.
Global Shipping Options
•Sea Freight
•Air Freight
•Express (DHL, FedEx, UPS)
•Rail Freight
•Door-to-Door
•Direct-to-Amazon FBA
Straight answers to the questions bulk-order buyers ask most often about custom medium bag production.
We define medium as 25–40cm in the primary dimension (width for crossbodies and handbags, height for backpacks, length for duffles). This covers the everyday-carry size range that most people buy when no size modifier is specified. Within medium, exact dimensions vary by bag type — a medium crossbody is 22–28cm wide, while a medium backpack is 38–45cm tall. We provide standard-dimension recommendations for every bag type.
Yes. Medium accounts for the majority of our production volume across all bag types. Our cutting, sewing, and QC lines are most optimized for medium dimensions — which translates to the fastest lead times (20–30 days standard), highest material efficiency (least waste per panel), and most competitive pricing of any size tier.
Most medium bags fit as airline personal items if designed within approximately 45 × 35 × 20cm. We recommend targeting 43 × 33 × 18cm as a safe universal-compliance dimension. We verify airline-compliance dimensions at the sampling stage and provide exact measurements for your product listing. Note: airline policies vary by carrier — we recommend checking your target airlines’ specific policies.
Medium bags typically have the most competitive MOQs of any size tier because our production is most efficient at medium dimensions. Standard construction bags start at accessible minimums. Multi-function, convertible, and waterproof feature additions may increase minimums modestly. Contact us with your specs for a specific confirmation.
Yes — unless your brand specifically targets mini or oversized markets. Medium is the safest first-launch size because it has the broadest buyer appeal, lowest return rate, and most predictable sell-through. We recommend launching a medium core SKU, then extending to mini and large sizes once the core is validated. This is the standard product-launch sequence for most successful bag brands.
Yes — and we recommend it. Medium is the size tier where design features have the most commercial impact. A medium backpack with USB port, anti-theft pocket, and laptop compartment outperforms a plain medium backpack at $10–15 higher retail. Every design feature on our site (multi-function, convertible, waterproof, textured, embellished) is available at medium scale.
Yes. FNSKU labeling, Amazon-compliant packaging, and carton labeling handled at our Guangzhou factory. Lifestyle and scale-reference product photography included free on production orders.
Yes. European Industrial Park, Shiling Town, Huadu District, Guangzhou. Monday–Saturday. Video tours available for remote buyers.
Send us your silhouette, dimensions, fabric, and feature requirements — we’ll come back within 24 hours with a detailed FOB quotation. Medium is our most efficient production tier: fastest lead time, most competitive pricing, broadest customization palette. No templates, no copy-paste pricing.