1. Protect the edges of your favorite novels using this lovely book sleeve. Don't worry about the damaged corners, or scratched cover! 2. The book sleeve is made of cotton canvas /Linen . The fabric is also interfaced inside to give extra strength. 3. The Medium version has approx 25 x 28 cm -(9.5 inch x11 inch) and fits most self published books (6x9) up to 600 pages, standard paperbacks, mass paperbacks, and regular hardcovers. 4. All the sleeves are hand-made, so they may differ slightly in pattern placement. They are little taller than your average sleeve for the extra protection of book.