This 5-loop interlocking bangle bracelet set is composed of one thick gold, one thick silver and one thin oxidized (black), one thin silver and one thin gold bangle. Our bangle bracelets and sets come in sizes small (2.1/2" diameter), medium (2.3/4"), or large (3"). A size medium will fit most wrists. Materials: 14k gold or 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.