Quick answer: AQL is a sampling standard for inspecting finished garments; AQL 2.5 for major defects means a set sample is checked and the lot passes only if defects stay within the allowed number.
When a bulk order of clothing is finished, nobody inspects every single piece. Instead, buyers and factories use AQL sampling: a statistically based method that checks a random sample and decides whether the whole lot passes. Understanding AQL helps you write clear quality terms, read inspection reports and avoid arguments about defects. This guide explains AQL in garment manufacturing, why AQL 2.5 is the apparel standard, and how to use the sampling table.
Quick answer
AQL (Acceptance Quality Limit) is the maximum defect level accepted in a random sample drawn from a production lot, based on ISO 2859-1. In clothing, the common standard is AQL 2.5 for major defects and 4.0 for minor defects, with zero tolerance for critical defects, at General Inspection Level II. For example, a lot of 501–1,200 garments needs a sample of 80 pieces; the lot passes at AQL 2.5 if 5 or fewer major defects are found and fails at 6.
Quality you can measure. Ravix Pro Industry is a sportswear and apparel manufacturer in Sialkot, Pakistan, with quality control for clothing brands and sports clubs: inline checks, final AQL inspections, measurement reports and photos before shipment, and welcome to third-party inspectors. MOQ 30 pieces per design. Quality assurance · Get a free quote.
Part of our guide: Certifications and Compliance in Apparel Manufacturing · Quick answers
Defect categories in apparel
| Category | Definition | Examples | Typical AQL |
|---|---|---|---|
| Critical | Could harm the user or break the law | Broken needle, sharp parts, choking hazards on kids’ wear, banned chemicals | 0 (none allowed) |
| Major | Likely to cause a return or make the item unsellable | Holes, open seams, wrong size label, measurements out of tolerance, bad print, shade mismatch | 2.5 |
| Minor | Small flaw, unlikely to cause a return | Loose threads, slight stitch irregularity, small marks that wash out | 4.0 |
AQL sampling table for clothing (ISO 2859-1, Level II, single sampling)
| Lot size | Code | Sample size | AQL 2.5: accept / reject | AQL 4.0: accept / reject |
|---|---|---|---|---|
| 51–90 | E | 13 | 1 / 2 | 1 / 2 |
| 91–150 | F | 20 | 1 / 2 | 2 / 3 |
| 151–280 | G | 32 | 2 / 3 | 3 / 4 |
| 281–500 | H | 50 | 3 / 4 | 5 / 6 |
| 501–1,200 | J | 80 | 5 / 6 | 7 / 8 |
| 1,201–3,200 | K | 125 | 7 / 8 | 10 / 11 |
| 3,201–10,000 | L | 200 | 10 / 11 | 14 / 15 |
The sample sizes and accept/reject numbers above are the long-standing ISO 2859-1 single-sampling values used across the apparel industry; the 2026 edition of the standard mainly adds skip-lot procedures and updated guidance. How to read it: for a 600-piece order, inspect 80 random pieces. If you find 5 or fewer major defects, the lot passes for major defects; 6 or more and it fails. Minor defects are counted separately against the AQL 4.0 column.
What does AQL 2.5 mean in practice?
AQL 2.5 does not simply mean “2.5% of garments may be defective”. It is the worst average quality level the sampling plan will regularly accept. In practice, a lot whose true major-defect rate is around 2.5% or lower will usually pass, while lots with clearly higher defect rates will usually fail. Brands selling premium products sometimes tighten majors to AQL 1.5; promotional merch may use 4.0.
Inspection levels
- General Inspection Level II: the default for apparel.
- Level I: smaller samples, lower cost, less certainty.
- Level III: larger samples for high-risk products or suppliers.
- Special levels S1–S4: small samples for specific checks such as measurements or destructive tests.
What inspectors check on each sampled garment
- Workmanship: seams, stitching, trims, cleanliness
- Measurements against the size chart and tolerances (often on a smaller sub-sample)
- Print, embroidery and sublimation quality and placement
- Colour and shade against the approved sample
- Labels, hang tags, barcodes and packing ratios
- Carton marks, quantities and carton drop test where required
See our sportswear factory quality control guide for the full inspection flow.
How to put AQL into your order
- State the standard in your purchase order: ISO 2859-1, Level II, AQL 0 / 2.5 / 4.0 (critical / major / minor).
- Agree a defect list with examples so both sides classify defects the same way.
- Agree measurement tolerances (for example ±1 cm on chest width).
- Decide who inspects: factory QC, your own team or a third-party inspector.
- Agree what happens on failure: 100% sorting and rework, then re-inspection.
From our factory floor in Sialkot
Ravix Pro Industry has manufactured since 2008, and every bulk order passes inline checks during sewing and a final random inspection before packing. We share a written inspection summary with photos, and we welcome third-party inspectors appointed by the buyer. Our experience is that most AQL failures start with unclear expectations, not bad sewing; agreeing a defect list and tolerances before production prevents nearly all disputes. See our quality assurance.
Want inspected, consistent production? Request a free quote or message us on WhatsApp. MOQ from 30 pieces per design.
FAQs
What is the standard AQL for clothing?
AQL 2.5 for major defects and 4.0 for minor defects, with no critical defects allowed, at General Inspection Level II.
How many pieces are inspected for 1,000 garments?
For a lot of 501–1,200 pieces at Level II, the sample size is 80 pieces.
What happens if an order fails AQL?
Usually the factory sorts and repairs the whole lot (100% inspection), then a new random inspection is carried out.
Is AQL used for small orders?
Yes, but for very small lots the sample may be most or all of the order. Many buyers simply inspect small orders fully.
Who should do the inspection?
Factory QC always inspects; many brands also hire a third-party inspector for the final random inspection on larger orders.
Related guides: sportswear quality control, manufacturing checklist for buyers, sample vs bulk production.
Sources
- ISO 2859-1:2026: Sampling procedures for inspection by attributes
- Ravix Pro Industry quality records, 2008–2026.
