These luminous / glow in the dark coin shaped alphabet plastic beads measure 7mm diameter by 4mm thick and have a 1mm hole which runs horizontally to the star which is imprinted on both sides of the beads in black. These change from a luminous green once exposed to light and then placed in the dark. These craft beads are imported from China and sold in packs of approx. 250 beads. Our alpha beads are perfect for personalizing necklaces, bracelets, key chains and all manner of kandi designs.