Just under ½” and hand carved from a prune pit. See Collectible Beads (Liu) page 68 for identical beads from China’s Imperial Court, purchased near the Forbidden City where vast amounts of royal treasure were housed and much was sold in the mid-19th century by unscrupulous courtiers. We have 13 beads and other than the Lie necklace, have never seen another. Each. Gift boxed with a certificate of authenticity.