These Glass tiles give a luminescent quality to any bathroom, kitchen or pool installation. Sold in sheets of 13 " x 13" mesh backed sheets. • Centers: N/A • Length: 3/4" • Width: 3/4" • Diameter: N/A • Projection: 5mm" • Finish Shown: Opaque, with a shimmer coating and the color is painted on the back of the tile so it will not scratch or chip the color off.