Sarana Tile lists Porcelain Black as an 11.5" x 13" matte porcelain mosaic. Sarana supplies it with a matte face that holds light rather than throwing it back. In a home it suits 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 11.5" x 13", listed metrically as 32.3x29.2cm. Each sheet covers roughly 1 sq ft. It appears in the Sarana Volume 8 catalogue at 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.