Handmade book cover. Size when open: 16cm tall, 30cm wide. When a book is inserted, it's about 11cm wide. (Please allow for some margin of error.) For paperback size books. Interfacing is not used. * * * * * I make each one with care, but as a handmade item by an amateur, there may be some unevenness in the stitching. Thank you for your purchase, understanding that this is a handmade item ( .ˬ.)