This round stack has seven rings: 4 black & gold and 3 gold bands. This ring is available in sizes 4.0 – 11.5, including all half sizes. Special note: because of the wideness of the stack rings, it is recommended to buy a stack that is 1/2 size larger than your “normal” ring size. Materials: oxidized silver (black), and 14k yellow gold-fill (14k yellow gold over a brass core/no nickel). The black (oxidized) components of our jewelry will wear over time and eventually achieve a beautiful antique-like finish. All materials are hypoallergenic. This ring is handmade in our California and New York production studios.