Colorful Absorbant Sandstone Car Coasters. Set of 2 with this design. Both coasters measure 2 1/2 inches in diameter and are a little over 1/4 inch high. A cut out is included in the coaster to make it easy to remove from the cup holder in the vehicle. Make a statement in your vehicle about your personality and keep the water from making a big mess when your drink starts to melt. Make sure to take your drink with you when you leave your vehicle and leave your coaster!