Vanguard Mosaics Nieve Azul Cielo is a 12" x 18" mosaic from Centura's Vanguard Mosaics range. Centura rates it for floors and walls, so one tile can carry a shower wall down onto the floor with no change of material. One box contains 14 pieces, enough for 21.87 sq ft, or 1.5621 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.