More-Petal Iron Bead Caps, Flower, Antique Bronze. Size: about 15mm in diameter, 11mm thick, hole: 1mm. Beautifully iron bead caps add interest to round beads. Bead caps can direct the attention focus to specialty accent beads in your jewelry designs. They can also be a great help when mixing small bead spacers with large-hole beads. So buy this 1000 pcs More-Petal Iron Bead Caps for $5.09 @PandaHall.