The product is a set of four round leather coasters signed by the maker, Col. Littleton. Each coaster features a unique design related to the Big Machine Music City Grand Prix Indy Car Series. Handmade in the United States, these coasters are stackable and measure 4.25 inches in length, width, and depth. The coasters are a one-of-a-kind piece perfect for all occasions and are ideal for adding a touch of American style to any space.