This Happy Hour Mix-Up is made up of 5 rings including 2 thick silver square, 1 thin rose gold square, 1 thin gold square and 1 thick gold square. 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) and sterling silver (.925). All materials are hypoallergenic. This original stack creation was featured during the Ring Bar Happy Houron IG Stories, and is handmade in our Upstate New York production studio.