Centura lists Zement Mosaics Grey in the Zement Mosaics range: a 12" x 12" mosaic. The rating covers both floors and walls, which lets a bathroom or kitchen run the same surface vertically and horizontally. One box contains 5 pieces, enough for 5.2 sq ft, or 1.04 sq ft a piece. Mosaic sheets are mounted on mesh, so the pattern stays aligned while it is set and the sheet can be cut to fit an edge.