Vesta Astoria Grey is a 12" x 24" porcelain tile. Porcelain is pressed and fired denser than ceramic, which is what lets it take water, frost and daily traffic. The glaze is fired onto the body and carries the colour and pattern, which is what allows the stone and concrete looks. Porcelain of this density suits floors and walls through the home. At this size the grout lines fall further apart, which makes a room look larger. Order the area you are covering plus about ten percent for cuts and waste.