This four-color interlocking bangle bracelet is composed of 1 thick yellow gold, 1 thick silver, 1 thick rose gold, and 1 thick oxidized silver bangle. Our interlocking bangle sets come in size small (2.1/2″ diameter), medium (2.3/4″), or large (3.0″), though size medium fits most wrists. Materials: 14k gold and rose gold-fill (14k gold over brass core/no nickel), sterling silver (.925) and oxidized sterling silver. All materials are hypoallergenic. The black (oxidized) components of our jewelry will wear over time and eventually achieve a beautiful antique-like finish. This interlocking bangle bracelet set is designed in San Francisco and handmade in our Upstate New York production studio.