Clearsheild Bookcover Size298mm (Max Height 11.7" X Max Width 19.6") Slip-On Book cover Jacket, easy to use! Suitable for Paperback books measuring up to 11.7inches in Height Protects books from spills, splashes and general wear & tear. Ideal for covering school and library books. Our ClearShield covers are designed in such a way that there is a 2 millimeter tolerance built into each jacket size. After confirming the ideal jacket size, its very important that you check that both the height and width of the jacket is suitable.