925 Sterling Silver Dot Wave Stopper Bead Safety Chain For European Charm Bracelets Fits European style 3mm snake bracelets with end cap of 4.2mm or smaller. Slide on (non-threaded) Bead 925 Sterling Silver (stamped) and silicone ring Size of the stopper bead: approximately 8.5mm diameter x 3.8mm wide; Total Length: approximately 75mm Hole size: extend from 2mm to 4.2mm