Sarana Tile lists Porcelain Dark Grey as a 12" x 10" glossy porcelain mosaic. The finish gives it a gloss glaze that reflects light back into the room. Residentially it works in kitchens, entry foyers and open-plan living areas. Commercially it is specified for retail floors, restaurant dining rooms and hotel lobbies. The nominal size is 12" x 10", listed metrically as 30x26cm. Each sheet covers roughly 0.84 sq ft. Sarana catalogues it in Volume 8 on page 12. It arrives mesh-mounted, so the spacing holds while the sheet is set and it trims down to meet a corner or a niche. Sarana prices it by the sheet.