Pro Jewelry .925 Sterling Silver Snake Chain + Clasp Trollbeads Style 7.5" Quantity: 1 Chain and 1 Clasp (7.5") Material: S925 Solid Sterling Silver, Will fit ALL styles of beads with 3mm cores or larger. How to measure for the bracelet: wrap a string around your wrist then add approx 3cm-4cm. This will allow enough clearance for beads.