These Glass tiles give a luminescent quality to any bathroom, kitchen or pool installation. Sold in sheets of 12 " x 12" mesh backed sheets. • Centers: N/A • Length: 1/2" • Width: 1/2" • Diameter: N/A • Projection: 8mm" • Finish Shown: A CLEAR GLASS, IRIDESCENT BLACK GLASS , A METALIC STEEL GLASS, AND GRAY/WHITE STONE MARBLE , Translucent glass and the color is painted on the back of the tile so it will not scratch or chip the color off.