Our bracelets are made from sterling silver 925 and come in different sizes starting from 16 cm up to 26 cm (including end pieces). Our bracelet has a unique system with a lock which you can open at both ends. If you first open the lock on the side where you put in the thin end piece, then you can take the beads on and off. If you open the lock on the other side first (the end piece with the bigger edge) you can take off your bracelet without any beads falling off the bracelet. The bracelets are not included with a lock. Elfbeads offers different kinds of locks.