Sarana Tile lists Porcelain as an 11.7" x 11.7" matte porcelain mosaic. It is finished with a matte face that holds light rather than throwing it back. 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 11.7" x 11.7", listed metrically as 29.6x29.7cm. Each sheet covers roughly 1 sq ft. It appears in the Sarana Volume 8 catalogue at 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.