19mm diameter, approximately 3mm thick. Set of 4 buttons with 4 holes each. Made of resin. Color is black. ・Instant purchase without comment is welcome! ・Please understand that these items have been handled by someone else. ・Stored at home, no smokers or pets. ・Price includes shipping. ・Please ask any questions about the product before purchasing. ・Regardless of comments, priority will be given to the person who presses the purchase button first. I generally do not reserve items or create dedicated pages. ・Only one set available, no exchanges possible. ・I may take some time to respond due to work. ・I will be taking a break from responding to comments and shipping during Golden Week and the Obon holiday period.