Miyuki 2.2mm round, flat, glass spacer beads are about half the height of an 11/0 seed bead, with a slightly larger hole. Approximate measurements are 2.2mm diameter, 1mm high, with a 1.5mm hole. Spacer beads are sold in 5g bags, unless otherwise noted, which contain approximately 810 beads. Use them in stacks or singly to separate other small seed beads. Please note that Miyuki's 2.2mm Spacer Beads are slightly larger in diameter than Toho's 2mm Demi-Round spacer beads.