This four-color square densa ring stack comes in 5-stack or 7-stack versions. The shorter, 5-stack version is made up of five rings including 1 thick silver, 1 thick rose gold, 1 thick yellow gold, 1 thin silver, and 1 thin oxidized silver band. The taller, 7-stack set is made up of seven rings including 1 thick (3mm) silver, 1 thick rose gold, 1 thick silver, 1 thick yellow gold, 1 thin silver, 1 thin oxidized silver, and 1 thin yellow gold.This ring is available in sizes 5.0 – 9.5, including half sizes. Special note: Because of the wideness of the stack ring set, 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 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 ring set was designed in San Francisco and is handmade in our Upstate New York production studio.