These coasters are made of cotton rope and will be sure to stop rings from getting on your furniture. Each coaster is a "natural" color, and will match wherever you decide to put them! These coasters measure about 5 inches in diameter. This ensure they will fit a mug, glass, mason jar or whatever your favorite cup is to drink out of! They are sold in a set of two. This item is not machine washable. Spot cleaning is advised.