These coasters are made of cowhide. They are 9.5 cm in diameter and made of thick, approximately 4 mm, domestic vegetable-tanned leather. This leather is tanned using tannins over a long period, so it develops a rich patina the more you use it. This is a set of 8 coasters. These coasters are thinner than the ones previously listed and the leather is a lighter color. Cups are not included. Please note that there may be some minor scratches due to the natural materials. Thank you. Material...Other