3 Polyvinyl + Flap Picture Disc Semi Rigid Crystal Clear Sleeves for 12" 33rpm Phonograph LP Vinyl Record Albums Poly Bag Outer Plastic Covers (+ 1 free dj magnet) *4-1/4" fold over flap and strap. *Goes over 12" vinyl, won't fit over jackets. *Outer dimensions: 12-1/4" x 12-7/16" (31.115 x 31.5912cm.) *Inner dimensions: 12-1/8" x 12-1/4" (30.7975 x 31.115cm.) *Semi rigid 8 gauge polyvinyl plastic.