About The Product: You can't go wrong with this unique set of coasters that combine style and function. They look great when not in use, but will protect your surfaces from dastardly water rings. Each coaster is made from plastic, has a non-slip cork bottom, and is approximately 3.5" (8.9cm) x 3.5" (8.9cm) x 0.2" (0.5cm) in size. Sold as a set of four.About The Design: An officially licensed product of Howard Robinson.