Each pandora glass bead made by high skilled worker, it is all handmade , perfect processing, 100% physical picture. 1. Material: perfect 925 sterling silver single core, high grade murano bead 2. Bead size: 14*7mm rondelle large sterling silver hole bead (approx.) 3. Core size: 4.5mm hole, they are compatible with all major brands of create your own jewelry as well as a wide variety of stringing materials, including our own add a bead bracelets and bangles. 4. Weight: 3 gram each bead (approx.).