4 to 26mm average. RARE! Boy, were excited to find this beautiful natural coral! These are 24" strands of graduated natural branch coral beads. The natural blush color of these coral beads is fantastic. These coral beads are very limited!!!!! FYI - There are very strict rules set in place regarding the importation of coral into the United States. International law protects the rarest and endangered coral in all parts of the world. Many varieties of coral are considered sustainable and in reality they grow faster when they are being harvested. These are natural branch coral beads! As with any natural bead, please expect slight imperfections in size, shape and color.