Thank you for viewing. The size is approximately 12cm. A brooch pin and a ring for a strap are attached to the back. The strap is not included. This is handmade, so there may be some rough spots. Please understand this before purchasing. I can also add photos of detailed areas if you would like. Thank you. Currently, I have a small number of items for sale, but I offer combined purchase discounts. 2 for 1500 yen. 3 for 2000 yen.