Smead Poly Envelope, 1" Expansion, Flap with Hook-and-Loop Closure, 7-1/2" W x 5-1/2" H, Frost, 3 per Pack (89583) Compact expanding envelope is perfect for protecting and storing small items 1" expansion Flap and hook-and-loop closure Waterproof poly Closed on three sides for security and portability Acid free, PVC free and archival quality