This 3-loop tri-toned interlocking bangle set is composed of one thick rose gold, one thick silver and one thin oxidized (black) 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.