It's Academic 2 Pack Transparent Customizable Shrink to Fit Book Covers - Set of 4 - 8 Covers Total (8) 4 sets of 2 covers, 8 book covers in total. Keep books clean and damage free with this durable, and water resistant cover. Insert photos, cutouts, or scrap-booking material to customize your own book cover. No measuring, cutting, folding or taping. Maximum book size: 9" x 12.5" inches Simply heat it with a hair dryer and it shrinks to fit, won't damage book or spine.