Rockart Serena Veincut Bone is a 24" x 48" natural stone tile with rectified edges, cut square after firing so the grout joint can close to about an eighth of an inch. The face carries the movement of split stone while staying flat enough to lay tight. Natural stone varies piece to piece, which is what gives a floor its depth, and wants sealing on installation. It suits walls and light-traffic areas. A large format means fewer grout lines, so a floor reads as one continuous surface. Order the area you are covering plus about ten percent for cuts and waste.