Take your favorite horror movie on the road with you. These fit in all standard size cup holders in every car make and model. The coasters are single side printing onto a polyester fabric. The bottom side is a soft neoprene that prevents scratching of your car. When they get dirty, just take them out easily and wash with soap and water then replace. These measure approximately 2.75" round x .17" thick with a small thumb cut out for easy removal.