Sarana Tile lists Pebbles as a 12" x 12" natural stone mosaic. On the residential side that covers kitchens, entry foyers and open-plan living areas. Commercially it is specified for hotel lobbies, boutique retail floors and spa suites. The nominal size is 12" x 12", listed metrically as 30.5x30.5cm. Each sheet covers roughly 1 sq ft. Sarana catalogues it in Volume 8 on page 14. 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.