A complete factory brief turns a vague idea into a quotable specification. To brief a factory for a custom bag design, send a tech pack with target price, volume tiers, materials, construction tolerances, decoration method, and compliance markets before asking for a quote. Factories that receive a tight brief return accurate pricing in 3–5 business days and avoid 2–4 weeks of sampling rework.
Why a complete manufacturing brief determines your landed cost
When a buyer sends a one-line request such as “quote a custom backpack,” the factory must guess at fabric weight, hardware grade, and finish. Those guesses compound. A 600D polyester shell instead of 1000D changes material cost by roughly 30–45%, and a stamped-steel buckle instead of a reinforced die-cast one changes both price and return risk. Each wrong assumption triggers a sampling round of 10–20 days, and three rounds can push a launch back by six weeks.
The brief is also where you protect margin. Stating your target FOB price and required compliance markets up front lets the factory engineer the build to that number instead of quoting a premium spec you never asked for. Buyers who brief well typically see the first quote land within 5% of final bulk pricing; under-briefed projects often swing 15–25% after the first physical sample.
What a factory needs before it can quote accurately
Assemble the brief as a single package. The components below are what a sourcing, quoting, or engineering team actually opens:
- Tech pack or specification sheet — construction drawing, dimensions, pocket layout, and material callouts (see the companion guide to building a tech pack for the document itself).
- Target price and incoterm — state FOB, EXW, or CIF and the unit price you need at your volume.
- Volume tiers and MOQ — e.g. 500 / 1,000 / 3,000 units per style, with color split.
- Delivery window — required ex-factory date and whether it is firm or flexible.
- Compliance markets — EU (REACH 1907/2006, GPSR), US (CPSIA, Prop 65), or both, plus any kids’-product rules (EN 71-3).
- Decoration brief — logo file, placement, method, and acceptable MOQ for that method.
- Packaging and labeling — polybag thickness, hangtag, care label, carton pack count.
Hand these together. A factory cannot price a bag from a photo alone; the missing fields become assumptions, and assumptions become change orders.
How to specify materials so sampling does not loop
Name the material family and the measurable grade, not a vague adjective. For woven nylon, give denier: 420D for linings, 600D for everyday bags, 1000D–1680D for load-bearing styles. For canvas, give fabric weight in ounces per square yard (12 oz, 16 oz, 18 oz). For coated fabrics, state coating type and thickness — PU at 0.15–0.4 mm, or TPE for phthalate-free builds.
If you want recycled content, say so explicitly and name the chain-of-custody you require (GRS or RCS). rPET typically carries an 8–15% material premium over virgin polyester and needs a valid certificate number in the brief. Leaving “eco” undefined forces the factory to propose its default, which may not match your brand claim or your market’s green-claim rules.
How to brief construction and hardware tolerances
Construction tolerances are where bags fail in the field, so put them in writing. Specify stitch density at 7–9 stitches per inch (SPI) for main seams, bartack reinforcement at every stress point (handle bases, strap anchors, zipper ends), and a suspended or foam-padded compartment if the product needs drop protection. State the zipper standard: a #5 coil for linings, a #10 molded-tooth or metal zipper for main openings, with a pull-strength expectation referencing ASTM D2061 (min 25 lbf for a closed zipper is a common bench mark).
For hardware, name the material and finish. Zinc-alloy die-cast buckles outlast stamped steel in pull tests; electroplating thickness of 5–8 μm resists salt-spray corrosion per ASTM B117 for 24–48 hours depending on grade. If you leave hardware “as standard,” the factory selects the cheapest passing sample, which may not survive your destination-market returns.
How to state decoration, compliance, and packaging in the brief
Decoration method drives both MOQ and unit cost, so fix it early. Screen print needs a 1–2 day screen setup and works above ~300 units; embroidery is priced per 1,000 stitches (a chest logo often runs 6,000–12,000 stitches) and needs a minimum to amortize the tape; DTF and sublimation suit photo-grade art but have different wash-rating limits. Color fastness should be specified: ISO 105-X12 crocking grade 4 is a defensible floor for backed or printed surfaces.
Compliance belongs in the brief, not in a later email. List the exact regulations and the test reports you expect: REACH SVHC screening, CPSIA lead-and-phthalate limits for US children’s bags, California Prop 65 warnings, and OEKO-TEX Standard 100 Class II for direct skin contact. State which certificates the factory must hold (ISO 9001 for quality system, amfori BSCI or Sedex for social audit) and attach your own restricted-substances list if you have one.
Packaging is often forgotten and always charged. Specify polybag thickness (≥0.028 mm where regs require), carton pack count (typically 20–40 units), and whether cartons need palletization. A missing packaging line becomes a surprise $0.20–0.50 per unit at bulk.
How to request and compare quotes on a like-for-like basis
Send the same brief to 2–3 factories and require one format back: per-unit price at each volume tier, tooling cost (cutting dies, screens, molds) shown separately, and EXW or FOB stated identically. Ask for the landed-cost math, not just ex-factory: ocean freight, duty by HS code (4202.92 for backpacks), and last-mile.
Read the quote for what it excludes. A low FOB price that omits metal zippers, certifies only REACH and not CPSIA, or assumes a 60-day lead time is not comparable to a quote that includes all three. Build a simple comparison table with the columns below and reject any quote that will not itemize tooling amortization across your forecast volume.
| Comparison column | Why it matters |
|---|---|
| Unit price at 500 / 1,000 / 3,000 | Shows the true volume curve, not a headline MOQ |
| Tooling cost and amortization | Separate one-time dies/screens from per-unit cost |
| Included certifications | REACH vs CPSIA vs OEKO-TEX change price and market access |
| Stated lead time | 35-day vs 55-day changes your launch date |
| Decoration MOQ | May force a larger first order than planned |
How to build a sampling plan into the brief
A brief without a sampling sequence produces one expensive “final” sample that is wrong. State the rounds you expect: a prototype (T1) to confirm shape and hand-feel, a pre-production (PP) sample in final material and color after you approve T1, and a bulk-production sample from the actual line. Budget 10–20 days per round and 30–45 days total before bulk.
Name who approves each stage and the sign-off format (photo, physical sample, or both). Specifying this up front stops the factory from shipping bulk against an unapproved proto and protects you when a defect appears at the 5,000-unit mark. Final inspection should reference AQL 2.5 (major) / 4.0 (minor) per ANSI/ASQ Z1.4, with in-process checks at cutting and sewing, not only at the carton.
Common briefing gaps that cause production delays
The recurring gaps are predictable. Missing color split forces the factory to default to an even 1:1:1 ratio you did not want. No compliance market means REACH-only when you also sell to California, triggering a Prop 65 re-screen. Vague “good quality” zippers become the cheapest coil, then fail pull tests. An unstated delivery date gets queued behind firmer orders, slipping 2–3 weeks.
Close these by treating the brief as a contract, not a conversation. Spending 20 minutes to brief a factory for a custom bag design properly prevents most of the rework that eats margin and launch dates.
The wider context sits in Custom Bag Sampling Process: Mockup to Pre-Production.
The wider context sits in Understanding Bag Factory Lead Times.
FAQ
Q: How detailed does a factory brief need to be for a first quote?
A: Enough to price materials, hardware, decoration, and compliance without guessing. At minimum: tech pack or drawing, target FOB price, volume tiers, material grades (denier/oz), zipper and hardware standard, decoration method, and compliance markets. With those, most factories return a quote in 3–5 business days.
Q: What happens if I brief only with photos and no tech pack?
A: The factory estimates every unspecified field, so fabric weight, hardware grade, and finish become assumptions. That usually means 2–4 sampling rounds of 10–20 days each and a final price that can swing 15–25% from the first quote. A written spec removes the guesswork.
Q: Should I include compliance requirements in the first brief or later?
A: In the first brief. REACH, CPSIA, Prop 65, and OEKO-TEX 100 Class II change both material choice and unit cost, and adding them after sampling means re-screening and re-tooling. State the exact markets and the certificates you expect (ISO 9001, BSCI or Sedex) up front.
Q: How many samples should I expect before bulk production?
A: Plan three: a prototype (T1) for shape and hand-feel, a pre-production (PP) sample in final material and color, and a bulk-line sample. Each round runs 10–20 days, so budget 30–45 days of sampling before you approve bulk.
Q: What lead time should I put in the brief?
A: State your required ex-factory date and whether it is firm. Realistic bulk lead time after PP approval is 35–55 days depending on material stock and line load; a firm date that is too tight will either be refused or queued behind firmer orders.
Q: How do I compare two factory quotes fairly?
A: Require the same format back: unit price at each volume tier, tooling shown separately, and identical incoterm (FOB or EXW). Compare included certifications, stated lead time, and decoration MOQ. A quote that omits CPSIA or metal zippers is not comparable to one that includes them.
Get a Custom Bag Quote
Send your brief and tech pack for a manufacturability review and a costed quote scoped to your volume and compliance markets:
Related:
- How to Create a Tech Pack for Custom Bag Production
- Custom Bag MOQ Guide: What to Expect from Factories