AQL Inspection Standards for Garment Orders: How to Set Your QC Level
You approved the sample, paid the deposit, and the factory says production is done. Now the only question that determines whether your money comes back as sellable inventory or a warehouse of rejects: how thoroughly was this order inspected? Most buyers never set an AQL level — they just hope the factory "checked everything." That hope is exactly how 500 defective dresses end up on your doorstep.
AQL (Acceptable Quality Limit) is the single most important number in garment QC, and yet it's the one buyers mention least. This guide explains what AQL actually means, how sampling plans work, how to choose the right level for your order, and the mistakes that get shipments rejected at the port.
What AQL Actually Means
AQL stands for Acceptable Quality Limit — the worst tolerable defect rate in a production batch that you are still willing to accept as a "pass." It is defined by the international sampling standard ISO 2859-1 (in the US, the equivalent is ANSI/ASQ Z1.4). Both describe the same single-sampling plans used by third-party inspectors worldwide.
An AQL of 2.5 does not mean "2.5% of goods can be defective." It means: when a statistical sample is drawn from your lot, a certain number of defective units is the maximum the inspector will allow before the entire lot is rejected. The lower the AQL number, the stricter the inspection.
How AQL Sampling Works (Step by Step)
The inspector follows a fixed, repeatable procedure:
- Determine lot size. Count total finished, packed units (e.g., 1,000 dresses).
- Pick inspection level. Most garment orders use General Inspection Level II — the industry default. Tightened or reduced levels apply only in special cases.
- Read the code letter. The standard's master table maps lot size × level to a sample-size code letter (e.g., lot 1,000 → code letter J).
- Draw the sample. Code J = 80 pieces inspected, chosen at random across cartons.
- Count defects against your AQL. Compare major and minor defects found to the acceptance numbers for your chosen AQL.
- Pass or reject the lot. Exceed the limit → the whole order fails and is reworked or 100% re-inspected.
Sample Size & Acceptance Numbers (General Level II)
| Lot Size | Sample Size | Major Defects @ AQL 2.5 | Minor Defects @ AQL 4.0 |
|---|---|---|---|
| 100 pcs | 20 pcs | 1 | 2 |
| 200 pcs | 32 pcs | 2 | 3 |
| 500 pcs | 50 pcs | 3 | 5 |
| 1,000 pcs | 80 pcs | 5 | 7 |
| 3,200 pcs | 200 pcs | 10 | 14 |
Notice the sample size grows slowly while the lot size grows fast. Inspecting 80 of 1,000 units (8%) is normal — you are statistically certifying the lot, not counting every piece.
Choosing Your AQL Level
There is no single "correct" AQL; it depends on how a defect hurts your business. Use this as a starting point:
| Defect Class | Typical AQL | Examples |
|---|---|---|
| Critical (safety/legal) | 0 (zero tolerance) | Flammable trim, choking-hazard buttons on children's wear, missing care labels |
| Major | 1.5 – 2.5 | Broken zipper, hole, wrong size, missing button, stain |
| Minor | 2.5 – 4.0 | Loose thread, slight color shade, minor creasing |
For children's clothing, lingerie, or anything with regulated safety trim, set critical defects to AQL 0 and major to 1.5. For basic promotional tees where a loose thread is harmless, AQL 2.5 major / 4.0 minor is reasonable.
Major vs Minor vs Critical — Classify Before You Inspect
The biggest source of inspection disputes is unclear defect classification. Write your defect classification into the tech pack so the inspector and factory agree before the check:
Defect Classification Checklist
- Critical: poses safety risk or fails a legal/market requirement — auto-fail regardless of count
- Major: affects function or salability — wrong measurement (>2 cm off), broken seam, open zipper, misaligned print
- Minor: cosmetic only, not noticeable at arm's length — a 2 cm thread, faint shade difference, slightly crooked label
- One defective unit can carry both a major and a minor defect — count them separately
- Define "appearance at arm's length" under D65 standard lighting — never under a factory's warm ceiling bulbs
The 3 Mistakes That Get Shipments Rejected
Frequently Asked Questions
Is AQL 2.5 the industry standard for clothing?
For general adult apparel, yes — AQL 2.5 for major defects and AQL 4.0 for minor is the most common default. Children's wear and safety-sensitive items are usually tighter (1.5 major, 0 critical).
What if my order is below 100 pieces?
Small lots still use the same standard. A 100-piece lot samples 20 units, so each defect carries more weight — be stricter on classification, not looser.
Can I skip AQL if I trust the factory?
You can, but you lose the contractual right to reject. Even trusted partners should document an AQL so "acceptable" means the same thing to both sides. At minimum require a signed final-inspection report.
Who performs the AQL inspection?
Either a third-party QC company, the factory's independent QC team, or (for new suppliers) an inspector you hire. The key is that the person applying the AQL is not the one who made the garments.
Sourcing this category? Essty Garment is a Guangzhou-based custom clothing manufacturer running inline and final dress manufacturing with documented AQL 2.5 inspection from 100 pcs per colour, 10–15 day production, and full private-label branding.