Denim 3x6 Glass Subway Tile (1 Square Foot) Absolute highest quality on the market. 100% defect free. Crystal glass surface with ceramic coated back in our popular Denim color Commonly used for kitchen backsplashes, shower tiles, bathroom tiles, and accent walls Product size is 76mm x 152mm x 8mm (approximately 3"x 6"x 5/16") Water resistant glass for safe use in wet or dry areas.