Dreambell 925 Sterling Silver Student Book Reader Bead For European Charm Bracelets Fits Pandora, Troll, Chamilia, Biagi and other European style 3mm snake bracelets Slide on (non-threaded) Bead Materials: 925 Sterling Silver (Stamped) Size: 10mm x 8.5mm x 6.5mm(thickness) Hole Size: approximately 4.8mm