12 common defects and AQL judgment standard for garment inspection

In the foreign trade apparel industry, returns and claims caused by quality defects are the biggest profit killers for enterprises. According to the latest data from China Chamber of Commerce for Import and Export of Textiles (CCCT) in 2026, the average return rate of China's exported apparel is as high as 8.7%, of which more than 90% of the returns originate from 12 types of basic quality defects that can be detected in advance.

Many foreign trade companies think that “small problems do not affect sales”, but in reality:

An insignificant color difference may cause the whole shipment to be rejected by overseas supermarkets.

A loose button can lead to children's clothing safety complaints and huge fines

An uncleaned thread may directly lower the grade of the brand in the minds of consumers

expertThird Party Clothing InspectionThe first step is to stop these defects at the factory before the goods are loaded on the ship. In this article, we will dismantle the garment in detailinspection of goodsThe 12 most common types of defects and the corresponding AQL sampling criteria help foreign traders avoid quality risks at the source.

I. Appearance defects (6 categories): the most intuitive and most likely to trigger the return of the problem

Appearance defects are the first thing customers notice when they receive the goods and are the type of defects with the highest return rate.

1. aberration

The color of the left and right pieces, front and back pieces of the same dress is not consistent; there are obvious color differences between different dresses of the same batch; the color of the big goods does not match with the confirmation sample.

Causes: unstable dyeing process, mixing of different batches of fabrics, inconsistent drying temperature.

Points for determination: In the standard light source box (D65 light source), observed at a distance of 60cm, the color difference visible to the naked eye is unqualified.

Risk level: Major deficiency (Major)

2. a hole

Holes of varying sizes appear in the fabric, including weaving tears, cutting tears, and sewing tears.

Points of Judgment:

Holes ≥ 0.5 cm in diameter, regardless of location, are considered serious defects.

Holes < 0.5cm in diameter, in visible locations (front chest, neckline) are major defects, in hidden locations (underarms, inner hem) are minor defects.

Risk level: Critical / Major

3. jumper

Stitch interruptions that occur during sewing, including single-needle skipped stitches, continuous skipped stitches, and skipped stitches.

Points of Judgment:

Continuous jumpers ≥ 3 stitches, regardless of location are major defects

Single-needle jumper, secondary defect in obvious locations, acceptable in hidden locations

Risk level: Major defects / Minor defects

4. stains

Oil, water, dye and dust stains that appear on the fabric.

Points of Judgment:

Stains ≥ 1 cm², regardless of location, are considered major defects.

Stains < 1cm² in size, minor defects in visible locations, acceptable in hidden locations

Risk level: Major defects / Minor defects

5. Dimensional deviations

The critical dimensions of the garment, such as bust, waist, garment length, sleeve length, etc., do not match the requirements of the work order.

Points of Judgment:

Deviations of critical dimensions exceeding ±1.5 cm are considered major defects.

Critical dimensions deviation between ±1cm~±1.5cm are minor defects.

The key dimensions are qualified if the deviation is within ±1cm.

Risk level: Major defects / Minor defects

6. Accessories issues (zippers / buttons)

The zipper does not close smoothly, the zipper head falls off, the button is loose, the button position is shifted, the color of the accessories does not match the fabric.

Points of Judgment:

The zipper does not close and the buttons fall off, which is a major defect.

Poor zipper closure and loose buttons are minor defects

Risk level: Major defects / Minor defects

Process defects (4 categories): core indicators reflecting the production management level of the plant

Workmanship defects, although not as intuitive as cosmetic defects, have a direct impact on the wear life and experience of the garment, and are an important measure of a factory's production capacity.

1. poorly sewn

Stitches not straight, uneven stitch spacing, missed seams, open stitches, uneven hemming, double track lines not aligned.

Points of Judgment:

Open threads and leaky seams are the main defects

Stitches that are not straight and unevenly spaced by more than ±1 stitch/cm are minor defects.

Risk level: Major defects / Minor defects

2. Too many threads

A large number of uncleaned threads remain on the surface of the garment, including topstitching threads, bottomstitching threads and decorative threads.

Points of Judgment:

If the number of threads per garment exceeds 5, or the length of a single thread exceeds 3cm, it is a minor defect.

Children's clothing with more than 3 threads, or a single thread longer than 1cm, is a major defect (risk of entanglement)

Risk level: Minor defects (Minor) / Major defects (Major, children's clothing)

3. poor ironing

There are visible creases, ironing yellow, ironing burnt, aurora marks, ironing watermarks on the surface of the garment.

Points of Judgment:

Yellowing and scorching as major defects

Visible folds, aurora marks, are secondary defects

Risk level: Major defects / Minor defects

4. packaging error

Wrong size, wrong color, missing hangtags, missing wash labels, wrong information on hangtags, packaging quantity discrepancies.

Points of Judgment:

Mis-coding, wrong color, and leakage, as major defects

Incorrect hangtag information and irregular packaging are minor defects

Risk level: Major defects / Minor defects

III. Safety deficiencies (category 2): red lines that must not be touched

Safety defects are the most serious category of all defects, especially for children's clothing products. Once a safety problem occurs, it will not only lead to the destruction of the whole batch of goods, but also may lead to legal action and brand crisis.

1. Sharp object residue

Sharp objects such as broken needles, metal fragments, scissor tips, burrs, etc. are left in the garment.

Point of decision: Any sharp object residue, regardless of size and location, is a Critical defect (Critical).

Special Requirements: All garments must be tested by needle testing machine, the sensitivity of needle testing machine should reach 1.2mm iron ball standard.

2. Small parts falling off (children's clothing focus)

Buttons, zipper heads, decorative buttons, bows, sequins and other small parts have substandard tensile strength and can easily fall off.

Points of Judgment:

For children's clothing under 3 years old, all small parts must be able to withstand a tensile force of ≥70N for 10 seconds without falling off.

For children's clothing aged 3-14 years, all small parts must be able to withstand a tensile force of ≥50N for 10 seconds without falling off.

Any small part that falls off is a critical defect (Critical)

Risk level: Critical deficiency (Critical)

AQL Judgment Criteria Table for Different Defects

AQL (Acceptable Quality Level) is an internationally recognized sampling standard and the most commonly used basis for quality determination in the foreign trade apparel industry. According to the severity of defects, it is usually divided into three levels, and corresponds to different AQL values.

Common Sample Size Reference (AQL 2.5/4.0, General Inspection Level II):

Lot of 100-500 units: 80 units sampled

Lot of 501-1200 pieces: 125 pieces sampled

Lot of 1201-3200 units: 200 units sampled

Lot of 3201-10000 pieces: 315 pieces sampled

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Apparel orders usually have tight delivery schedules, and once quality problems are found, the time left for factories to rectify the problems is very limited. Traditional third-party inspection companies often need 24-48 hours to issue a formal report, which can easily delay the shipment.

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