SomerTile FKOMPR2 Penny Porcelain Mosaic Floor and Wall Tile, 12" x 12.625", Black First-quality porcelain tile for floor and wall use Glazed smooth finish with a high sheen and a uniform appearance in tone P.E.I. Rating II is suitable for all interior walls and light foot traffic such as powder rooms -C.O.F. greater than .50 is recommended for standard residential applications and is marginally skid resistant -Mosaic Chip Width (in inches): 0.8 & Mosaic Chip Length (in inches): 0.8; 10.2 square feet per case for each product