It's Academic 2 Pack Transparent Customizable Shrink to Fit Book Covers (Set of 3 - 6 Covers Total) Set of 3 packs of 2 covers - 6 covers total One size fits all / most (Max book size 9" x 12.5") - Slip on and heat shrink Transparent - Identify your book easily or customize to your own style Easy to put on - No measuring, no cutting, no folding, and no taping Easy to remove - Won't damage book or spine