Vista-Gloves Slip-On Book Covers - Fits Up To 11 1/2 Inch H Book - 10 Pack Crystal clear, heavy-duty 7 mil vinyl fits books up to 11 1/2" high Slip-on book covers with adjustable straps adjust easily to fit most book widths Reusable, simply remove the cover and place on another book Select exact height for soft cover books; Add 1/4" to height for hardcover books 10 covers per package