Material: Polyester All of our glitter is made from polyester and does not dull under solvents such as epoxy or nail polish. Size: 5/16 or 0.3125 or 7.93mm Color: Mostly black but has a holographic look to it. Great for Tumblers and Nails. POLYESTER GLITTER UV resistant solvent resistant sparkle will not dull high-quality material lays flat holds up to higher temps