Thank you for viewing. This is a simple book cover. It was made from COBALT (blue) of the popular Italian leather, MARGOT. MARGOT is leather made from European cowhide tanned with vegetable tannins and has a scratch finish. As you use it, the color will deepen and develop a luster over time. We hope you enjoy the aging process. ・Product Size (outer dimensions): 30.1cm x 16.2cm The inner height is 154mm. It supports the tall paperback size (height 152mm) from major publishers. Also, it is a fold-over type to accommodate the thickness of the book. MARGOT is 1.3mm thick and has a soft, calm feel, so we hope you enjoy the texture. ・Thickness of MARGOT used 1.3mm ・Thread Binimo MBT #5 Color number 18 ・Weight 63g The fifth photo shows a Kodansha Bunko with 380 pages, and the sixth photo shows a Bunshun Bunko with 580 pages. ※The last photo is a comparison photo after aging for about six months. Due to the genuine leather and handmade nature, there may be slight wrinkles and scratches. Please check the photos and understand. We apologize, but please refrain from comments requesting price negotiations. Color...Blue Pattern/Design...Solid Material...Genuine leather Type...Book cover