x23 - 3mil average thickness mid fit outer sleeves for 12" vinyl records. Usually 12-3/4" x 12-3/4" give or take 1/8". Good over singles, LP's, and most 2LP's. Protects from dirty hands, oily fingertips, shelf wear, & minor impact + abrasions. Also preserves shrink wrap. Support Sleevie best w/ multiple items @ checkout.