This 3mm wide two-toned black and gold square bangle bracelet is offered in three sizes: Small (2.1/2″ diameter), medium (2.3/4" diameter), and large (3″ diameter). A size medium will fit most wrists. Materials: 14k gold-fill (14k gold over brass core/no nickel) and oxidized sterling silver (.925). All materials are hypoallergenic. The black (oxidized) components of our jewelry will wear over time and eventually achieve a beautiful antique-like finish. This bangle bracelet was designed in San Francisco and is handmade in our Upstate New York production studio.