Sarana Tile lists Porcelain as an 11.6" x 11.6" glossy porcelain mosaic. Sarana supplies it with a gloss glaze that reflects light back into the room. On the residential side that covers 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 11.6" x 11.6", listed metrically as 29.5x29.5cm. Each sheet covers roughly 0.82 sq ft. Sarana catalogues it in Volume 8 on page 7. 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.