These 3 mil high density polyethylene (HDPE) inner sleeves are a great replacement for cheap paper sleeves. The sleeves are thick enough to prevent curling when inserting into record jackets, and they are a lot less expensive than polylined paper sleeves.

Dimensions: 12.0625" x 12.0625" (tolerance: +- 1/16")

Sold in packs of 100 pieces.