J. Jewelry Twin Charm Bead Fit for Pandora Bracelet 1pc Quality Silver Plated Twin Charm Bead Fit for Pandora Bracelet. Core Diameter: about 4.5mm Bead Size: around 1/2" x 1/2" x 1/4" ( W x H x D ) Compatible with Pandora, Biagi, Chamilia and Trollbeads Quality Charm Bead. Great for Gift!