The material is made of cowhide leather in the original color, vegetable tanned, with a special dyeing technique. size A5:21cm*14cm A6:17cm*9cm ===== Shipping: This is a handmade work, and it usually takes us 10 days to make the order. Thank you very much for your patience, please contact me if you have any questions. We will make your order as soon as possible and promise to ship it the first time.