The 4-Point Fabric Inspection System Explained

Short answer: the 4-point system is the industry-standard method for grading fabric quality. Inspectors score each defect 1 to 4 points based on its size, total the points on a roll, and compare the result against an agreed limit — commonly a maximum of 20 to 40 points per 100 square yards. It turns \“this fabric looks fine\” into a measurable pass or fail.

Fabric defects are one of the most expensive quality failures in apparel: cut them out and you lose material; miss them and they end up in finished garments. The 4-point system catches them before cutting.

What the 4-Point System Measures

An inspector examines the fabric, usually on an inspection machine under proper lighting, and assigns points to every defect found:

For defects that are not linear, the same length brackets apply. Any single defect is capped at 4 points, no matter how large.

How the Score Is Calculated

The result is expressed as points per 100 square yards. The inspector:

Common acceptance limits are 20 points per 100 square yards for stricter programs and up to 40 points for more tolerant ones. Some buyers also set a maximum number of points per roll, so one bad roll cannot hide behind a good average.

What Counts as a Defect

Typical fabric defects the system captures:

The system is only as good as the inspector's consistency, which is why it should follow a written standard.

Why It Matters to Buyers

Where It Fits in the Quality Chain

Fabric inspection is the first gate, before cutting:

Skipping fabric inspection means defects are discovered only after you have paid for cutting and sewing them.

What to Specify in the Purchase Order

Common Mistakes

Conclusion

The 4-point system makes fabric quality measurable: score each defect 1 to 4 points, total per roll, and compare against a points-per-100-square-yards limit. Specify it in the purchase order together with a per-roll cap, and inspect before cutting. It is the cheapest place in production to catch a defect.

Key Takeaways for Buyers

If you are costing this right now

Send the tech pack with three things pinned down: the GSM, the fibre composition and the wash requirement. Those three decide the quote more than anything else, and they cost nothing to get right. Everything else on a quote can be negotiated later. Those three cannot be guessed later.