These Jet Vitrail beads put the O in Opulence! Disk-shaped Czech glass O beads are small in size but big on potential. Each O bead measures approximately 3.8mm x 1mm. Dip these donut-shaped delicacies in any jewelry project. They work great as spacer beads, seed bead companions, and as elements for bead embroidery and bead weaving. Questions? Call our friendly sales staff at 1-800-366-2156, or email us.