Sandstone Coaster, Square, 3.94" 3.94" x 0.24", White, with cork backing. All sand stone coasters are sold in increments of -4-. Single sample tiles are available through your Conde Account Manager. Cork backing has a glue side that is attached to the coaster after sublimation. IronClad coated sandstone tiles are perfect for adding photographic images or spot graphics. Match coasters with these kitchen items: aprons, cutting boards and trays, sold separately.