Sarana Tile lists Porcelain White Penny as a 12" x 12" glossy porcelain mosaic. Sarana supplies it with a gloss glaze that reflects light back into the room. In a home it suits kitchens, entry foyers and open-plan living areas. On commercial jobs it turns up in retail floors, restaurant dining rooms and hotel lobbies. The nominal size is 12" x 12", listed metrically as 30x30cm. Each sheet covers roughly 1 sq ft. It appears in the Sarana Volume 8 catalogue at page 13. 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.