there are 2 kinds of product specifications: width 140mm*length 240mm, width 300mm*length 300mm, thickness about 0.2mm the texture is random, and different angles have different reflection effects thin as paper, fragile, some have slightly damaged corners or slightly cracked paper it is not a quality problem, please take pictures carefully if you mind, if you have special requirements, be sure to order notes or contact customer service shells are all natural and reflect a variety of beautiful colors. it is a good material for decoration, handicrafts, musical instruments, furniture, and other inlays.syi