4 Pack - Solid Jumbo Stretchable Book Covers 4 pack of Solid Jumbo stretchable book covers Fits up to 7"x8 1/4" to 10 1/2"x13" Reusable & Washable - Protects Textbooks Easy to use : open book face down 2.lift up front & backcovers. 3. slidecover over book flaps & close book. Comes in a Assortment colors