Apparel OEM in China: Custom Clothing Manufacturing Guide

China's Apparel Manufacturing Regions

China's garment industry is clustered by province, and each region specializes in different categories. Choosing the right region for your product is the first sourcing decision.

The Apparel OEM Process (7 Steps)

1. Tech pack — prepare flat sketches, point-of-measurement (POM) chart with tolerances, fabric specs (composition, gsm, width), Pantone colorways, trim details (zippers, buttons, labels), and care-label content.
2. Pattern making & grading — the factory makes the base pattern (7–10 days) and grades it to your size range (XS–XXL). Approve the measurement chart before sampling.
3. Sample rounds — 1st fit sample (check silhouette & measurements), 2nd fit sample (corrections), PP (pre-production) sample in actual bulk fabric. Sign off the PP sample before cutting — no exceptions.
4. Fabric sourcing & dyeing — confirm fabric composition, gsm, and color fastness (grade 3–4 minimum). Approve a lab dip (physical color swatch) for each colorway before bulk dyeing.
5. Cutting & sewing — fabric is spread and cut by the marker, then sewn in production lines (15–30 days for bulk). Request in-process photos.
6. Inline & final QC — inline inspection at 20–30% (measurements, stitching), then final AQL 2.5 inspection on 100% packed cartons.
7. Packing & shipping — poly-bag or box packing, size-run carton marks, then ship DDP. See private label packaging if you need custom retail boxes.

Apparel OEM Process Timeline

Worked Example: 500 Custom T-Shirts

Let's cost a custom 180gsm cotton t-shirt with a 1-color screen print, 500 pcs in 2 colors (250 each), FOB Guangzhou:

• Fabric (180gsm combed cotton): $3.50/pc × 500 = $1,750
• Cutting & sewing: $2.00/pc × 500 = $1,000
• Screen printing (1 color): $0.50/pc × 500 = $250
• Label & polybag: $0.20/pc × 500 = $100
• Sample fee (2 rounds): $150 (refundable against bulk)
• Total FOB: $3,250 → $6.50/pc (sample fee deducted)
• MOQ: 300 pcs (500 ordered, comfortably above)
• Lead time: 40 days (10 days sample + 5 days fabric + 20 days sewing + 5 days QC)

Landed cost per pc (DDP US, ~$1.50 freight + 16% duty): $6.50 + $1.50 + $1.04 = $9.04/pc. At a $24.99 retail, that's a ~64% gross margin — solid for a branded tee.

Key Quality & Compliance Concerns

• Fabric quality — confirm gsm (grams per square meter), composition %, and yarn count. A 160gsm tee costs $0.80 less than 180gsm but feels cheap and shrinks more.
• Color fastness — grade 3–4 minimum (ISO 105). Dark colors on white fabric or red/black on cotton often bleed; ask for a wash test report.
• Sizing consistency — lock the POM chart with ±1 cm tolerance. Measure 5–10 pcs per size during inline QC. Slippage usually comes from marker width or fabric shrinkage.
• Workmanship — check stitch density (10–14 stitches per inch), seam strength, button/zipper security, and loose threads. AQL 2.5 inspection covers these.
• Compliance — OEKO-TEX Standard 100 (no azo dyes, formaldehyde, heavy metals), GOTS (organic cotton), and BSCI audit (ethical labor) for EU buyers. Get certificate numbers and verify them online.

How to Find Apparel OEM Factories

• Alibaba / 1688 — filter by "Verified Supplier" and product category. Ask for photos of the sewing floor, not just finished products.
• Canton Fair & Intertextile — meet factories face-to-face; the apparel halls are enormous. See our Canton Fair guide.
• Sourcing agent — Yeatru's network covers all five apparel regions. We do factory audits (checking BSCI, worker count, sewing machines) before you commit.

Common Mistakes to Avoid

• No tech pack — factories guess measurements, samples take 4+ rounds, and bulk defects hit 15–25%.
• Approving samples in substitute fabric — a sample in 200gsm will fit differently from bulk 180gsm. Always approve the PP sample in actual bulk fabric.
• Skipping lab-dip approval — "navy" in China is rarely the navy you expect. Approve a physical Pantone-matched swatch before dyeing.
• No inline QC — sizing defects caught after bulk sewing mean rework or scrap.
• Ignoring fabric MOQ — ordering 300 pcs in 3 colors may fail the 500m woven minimum; the factory will substitute or charge a surcharge.

Frequently Asked Questions

1. What is the typical MOQ for apparel OEM in China?

Garment MOQ is usually 300–500 pcs per SKU per colorway. Fabric MOQ is roll-based: 300–500m for knits, 500–1,000m for wovens. A single t-shirt style in 3 colors needs 900–1,500 pcs to meet fabric minimums. Some factories accept 100–300 pcs if you use in-stock fabric.

2. What is a tech pack and why do I need one?

A tech pack is the blueprint for your garment: flat sketches, point-of-measurement chart, fabric specs (composition, gsm, width), Pantone colorways, trim and labeling details, and construction notes. Without it, factories guess, samples take 3–4 rounds, and bulk defects are common. A good tech pack cuts sampling time in half.

3. How do I source fabric for apparel OEM?

Work with the garment factory's fabric supplier or go direct to fabric mills in Guangdong (wovens) or Zhejiang (knits/socks). Specify composition, gsm, width, and color fastness grade. Order a lab dip for approval before bulk dyeing. Organic cotton requires a GOTS certificate from the mill — verify the number, don't just take the factory's word.

4. How long does apparel OEM production take?

New styles take 45–75 days: 7–10 days pattern making, 10–14 days sampling (2 rounds), 10–15 days fabric sourcing & dyeing, 15–30 days bulk sewing, 3–5 days QC and packing. Reorders of approved styles take 30–45 days since pattern and fabric are confirmed.

5. What is OEKO-TEX and do I need it?

OEKO-TEX Standard 100 certifies textiles are free of harmful substances (azo dyes, formaldehyde, heavy metals). Most EU and US retailers and Amazon require it for apparel in contact with skin. GOTS certifies organic cotton. Ask the factory for the fabric mill's certificate number and test report, then verify it on the OEKO-TEX website.

6. How do I ensure sizing consistency in bulk?

Lock the graded POM (point-of-measurement) chart with tolerances (usually ±1 cm) before the PP sample. During inline QC, measure 5–10 pcs per size per color at 20–30% completion. The final AQL 2.5 inspection checks measurements again. Slippage happens when markers are cut wider or fabric shrinks differently — catch it early.

Conclusion

Apparel OEM from China lets you build a clothing line with full design control at $3–$15/pc and 45–75 day lead times. The keys to success are a complete tech pack, approving the PP sample in actual bulk fabric, locking fabric MOQs upfront, and running inline QC before the whole order is sewn. Compliance (OEKO-TEX, GOTS, BSCI) is non-negotiable for EU/US retail and Amazon. Contact Yeatru for a free apparel OEM quote — we'll match your category to the right region, audit the factory, and handle tech pack, sampling, and QC end-to-end.