Five (5)December Birthstone Color Rhinestone Charms Spacer Beads For Snake Chain Charm Bracelet Quantity: 5 Charm Size: Approx: 11mm, Hole size: 4.7mm Slide on core Not Threaded. Thickness: 5.8mm Material: Zinc metal alloy +Rhinestone, Silver Plated Metal Base Fits: All major Brand Bracelets, such as Pandora, Troll, Chamilia, Carlo Biagi, Zable, and other add-a-bead bracelets.