Style: Sandstone Drink Coaster Mom always told you to use a coaster, so make her happy by using one from Zazzle! Made to keep your tables scratch-and-moisture-free, our sandstone coasters have a cork backing, so you can use them on any surface. They also have a matte finish and work best with vintage illustrations, black-and-white photos, and personal text messages. Dimensions: Diameter: 4.25" Thickness: 0.25" Weight: 3.88 oz. Made of sandstone with a cork pad backing Not dishwasher safe Designer Tip: To ensure the highest quality print, please note that this product’s customizable design area measures 4.25" x 4.25". For best results please add 1/8" bleed