Thank you for viewing. ☆ This was made for a size similar to a "shinsho-ban" (Japanese paperback) book, but "shinsho-ban" books come in various sizes. Please be sure to check the book's size before purchasing. It cannot be used for books with a height of 182mm. ★ For books with a width of 115mm, the adjustment area is short, so please refrain from purchasing as it may be unstable. Outer fabric: Cotton sheeting (with adhesive interlining) Lining: Cotton I enjoy making these as a hobby, finding fabrics I like. Please refrain from purchasing if you are concerned about imperfections such as warping, or if you are looking for a perfect product.