Dancing light and colour in perfectly formed gem like tiles. The size varies between 15-25mm and they are 3.5mm thick for combining with our other glass products. Clean, slightly rounded edges make puzzling and grouting effortless and it makes the spaces between smaller for a more professional finish. These tesserae are not meant to be cut as the mirror backing may be damaged by the nipper blade. Sold in 100g contains approximately 40 pieces Can be unstable in direct prolonged sunlight.