Thank you for viewing. This is a handmade item. It's a simple book cover made from black cowhide (slightly firm leather) with black stitching. ★ Although it's not made from a single piece of leather, the leather's thickness, texture, and luster are matched. Because it's genuine leather, I think it will develop a nice texture the more you use it. ⚫︎ Compatible with paperback books (15.2 x 10.6 cm). Size: Approximately 16.4 x 24.5 cm (photographed with a 15.2 x 10.6 cm paperback book) ⚫︎ Compatible with larger paperback books (15.7 x 10.6 cm). Size: Approximately 16.7 x 24.5 cm (photographed with a 15.7 x 10.6 cm paperback book) ⚫︎ Compatible with Shinsho-ban (17.3 x 10.5 cm, thickness approximately 1.4 cm) Size: Approximately 18.4 x 24 cm (photographed with a 17.3 x 10.5 cm Shinsho-ban) ⚫︎ Compatible with B6 (18.2 x 12.8 cm) and Yonroku-ban (18.8 x 12.8 cm) sizes, up to 2 cm thick. Size: Approximately 20 x 29 cm (The image was taken with a 18.8 x 12.8 cm Yonroku-ban) ※ The leather used is selected for its good condition and to allow you to enjoy the texture of the leather. However, natural leather may have original scratches, scuffs, color variations, and unevenness on the back. We hope you will enjoy it as a natural characteristic. Please be sure to check the images and understand the characteristics of the leather before purchasing. ※ Regarding use When setting the book, the leather is not slippery, so it may require a little technique, but the leather will soften with use and become easier to set. ※ Regarding custom orders We do not keep leather in stock and find it difficult to obtain the desired leather, so we do not accept custom orders. The leather purchased for production is almost completely used up, so the book covers on sale are unique items that you can enjoy. ※ Regarding bookmarks Bookmarks (eyelet fittings, leather strings, and round leather) can be attached. The fee is 100 yen. We have several colors of eyelet fittings, leather strings, and round leather available, so you can choose. Please inquire if you wish. ※ If you have any questions or requests, please feel free to contact us. Thank you. #bookcover #cowhide