Crystal mosaic tiles, which can be see through so it gets the name as "crystal", but with the color paints on the back of the mosaic tiles makes thousands of colors are possible. The glass tile has sheet size: 11.8" x 11.8"; and tile size: 1 x 1 inch; and the tile thickness: 5/16"; on the back of our product, it is mesh mounted so is easy for cutting and installing. The color on all backsplash crystal tile at is kiln fired onto back of tile, not painted on, which means it will never scratch, chip, fade or peel.