Carmen Grey is a 2" x 8" porcelain tile from Sarana Tile. On the residential side that covers kitchens, entry foyers and open-plan living areas. It also carries commercial use in retail floors, restaurant dining rooms and hotel lobbies. The nominal size is 2" x 8", listed metrically as 5x20cm. It appears in the Sarana Volume 8 catalogue at page 41. Sarana prices it by the square foot. Porcelain is pressed and fired dense enough to take water and traffic that a wall-grade ceramic could not.