Black Rainbow Sparkle 18mm heart shaped plastic pony beads measure 18mm wide by 17mm high and have a 4mm hole which runs horizontally across 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 10 and 20 beads. Pony beads are ideal for a wide variety of projects like; necklaces, bracelets and dummy clips