Thank you for viewing! Book cover for paperback books (no adjustments) Please note: When taking the photos, I used a paperback book that was 20mm thick, and there was a little extra space in the width. I don't recommend using it for books that are only 10mm thick, as it would be too loose. The cover is made with a muted color fabric with a cat pattern, and the lining is made of the same fabric for a clean finish. Outer fabric: Cotton linen (with interfacing) Lining: Cotton linen I enjoy making these as a hobby, finding fabrics that I like. Please refrain from purchasing if you are concerned about minor imperfections such as warping, or if you are seeking a perfect product.