This Happy Hour Mix-Up is made up of 6 rings including 1 thin gold round, 1 thin oxidized round, 1 thin silver round, 1 3mm silver round, 1 thick gold round and 1 thick silver round ring. We've included photos of this set paired with our Kir Royale set to show just one example of how to level up your stack aesthetic. This listing is for the Mix-Up #11 set only. Special note: Because of the width of our stack ring sets, it is recommended to buy a stack that is approximately a half to a full size larger than your normal ring size. Materials: 14k gold-fill (14k gold over a 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 original stack creation was featured during the Ring Bar Happy Hour on IG Stories, and is handmade in our Upstate New York production studio.