Made from red leather tanned with tannins. Although thin, it's a dense leather with a slight stiffness from the tannin tanning process, and it makes a squeaking sound. It has almost no luster, but it will develop a shine the more you use it, and it will become more comfortable in your hand. The edge (cut surface) has also been beautifully polished. The sewing thread is linen thread, and everything is hand-sewn, so it's durable. The size when open is approximately 244mm wide and 169mm long. A Hayakawa Bunko 550-page book was used for the photography. Because it is natural leather, there may be scratches, wrinkles, uneven coloring, and blood vessel marks. Please take a good look at the photos before purchasing. #HayakawaBunkoOK #GenuineLeatherBookCover #GenuineLeatherBunkoCover #HandmadeHandSewn