Size: 4"x 4"x 1/4". Quality: 100% recycled wood source. Sustainable: We make them strong (1/4" thick) so that they can be re-used forever. Made with sustainable inks and a UV coating, as well as, an eco-friendly lacquer that covers the entire coaster to permanently protect the wood. They also have recycled rubber stoppers on the bottom for grip and support. Care: Washable with soap and water.