# Pilling vs Bobbling vs Matting on Vintage Knits: The Fiber-Depth Test for Real Wear Assessment

_By GradeThread Team · Published September 13, 2026_

> Pilling is cosmetic, matting is structural. Here's the fiber-depth test that tells you which one you're looking at before you grade a vintage knit.

# Pilling vs Bobbling vs Matting on Vintage Knits: The Fiber-Depth Test for Real Wear Assessment

Here's how to grade pilling and matting on vintage sweaters: light surface pilling that shaves off cleanly stays in Fabric Condition as a minor cosmetic note and rarely drops a knit below Excellent or Very Good, while matting — fiber fused into a dense, non-reversible mat that won't shave or brush apart — is a Fabric Condition failure that caps the grade at Good or lower. The test that separates them takes about ten seconds and a fabric shaver.

We've had two sweaters land on the same grading table in the same week, both covered in surface texture, both listed by the seller as

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