Bridal Pearl 9mm Barrel Pony Beads, measure 6mm high by 9mm wide and have a 4mm hole which runs vertically down the middle of the bead. These plastic pony beads are made in the USA with high-quality, non-toxic polystyrene plastic and sold in packs of approx. 100 and 500 beads. Pony beads are ideal for a wide variety of projects like; necklaces, bracelets and dummy clips etc..