This product is equipped with a spot drill tool, you need to buy it and drill it yourself. This coaster has a diameter of 10cm and fits most mugs. The shiny and practical coasters can not only protect the tabletop from scratches or , but also can be an impressive home decoration, showing your gorgeous and exquisite taste. Made of high-quality wood with cute patterns, beautifully designed, sturdy and durable, the coasters are in place. Easy DIY, pour the diamonds corresponding to the numbers on the coasters into the tray, then tear off the film covering the coasters, and paste the corresponding diamonds on the coasters according to the numbers on the coasters. coaster crafts are the perfect gift for adults and kids. You can give it to your friends or family as a gift for 's Day, Birthday, Christmas, Mother's Day and New Year. size: 10CM in diameter Material: Wood, plastic, metal colour: Multicolor Package Contents: 10 x cork pads 1 x holder 1 x diamond pen 1 x Sticky block(randomly colored. Cannot be chosen the specific color.) 1 x diamond tray 1 set Multicolor diamonds Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.