Sterling Silver Gold-tone Cubic Zirconia Rondelle Simulated April Birthstone European Style Bead Charm Slide-on (not threaded) charm Solid 925 Sterling Silver in Gold-Tone Finish. Approximately 4.5mm Hole Size Fully compatible with European-style Charm Bracelets such as Pandora, Troll, Biagi, Persona, Ohm, Kay's Charmed Memories and More.