This spring back bracelet is made from 2 very rare, hard to find "Royal Lace" forks from 1973. It has a spring hinge feature which makes it easy to put on and take off. *If you like them to fit more like a bangle; I suggest at least 1" bigger than your wrist as they are more oval shaped than round. Otherwise 1/4 - 1/2" bigger is sufficient. To prolong the life of the spring; please put on and take off on the side of your wrist to avoid stretching it.All of my pieces are handmade by me. All of my pieces are handmade by me. I design, cut, drill, shape, sand, antique, and assemble each piece. I only use hypoallergenic surgical stainless steel chain and ear wires.