Glass Mosaic Tile Marine Blue Pattern works for swimming pools, backsplash, bathroom, and shower walls. The colors are given by a coating applied on the back of each tile with variances of different tones from light to dark within the stripes, creating a rich and hand made look. It is made of clear glass and mounted on a 12 inches by 12 inches fiberglass sheet in a french pattern for an easy installation. The tile is 8mm thick.