Celtic Knotwork Blue Moon Tile Coaster A blue crescent of Celtic Knotwork masquerades as the dark side of a blue moon, a rare sight indeed! Product InformationLiven up any room or party with our fun, hip tile coasters, measuring 4.25" x 4.25" and 1/6-inch thick. Images are applied with a polyester resin that accepts dye as part of the coating. Four felt pads protect your furniture from scratches. Dishwasher safe. Not for use with abrasive cups and mugs. | 
