SEXY SPARKLES Birthstone Charm Beads European Compatible Quantity: One January Birthstone Charm Material: Zinc Metal Alloy, Silver Base Metal Size: Hole of the charms is 4.7mm slide on Core (not threaded) Fits Pandora, Troll, Chamilia, Carlo Biagi, Zable, and other add-a-bead bracelets. Also compatible fit with European style Add a Bead bracelets and necklaces brands like Trollbeads Chamilia Biagi Caprice Hallmark Connections Oriana Lovelinks by Aagard Reflections Individuality Storywheel Novobeads Storyvines DaVinci Kays Charmed Memories Ohm SimStars Brighton Zable and European.