This 5-stack tall mixed shape densa ring is rigid, yet extremely comfortable due to its softly rounded edges. This stack is made up of five rings including 1 thick (5mm) silver round, 1 thick (3mm) sterling or oxidized (black) silver square, 1 thick rose gold square, 1 thick yellow gold round, and 1 thin two-toned silver and yellow gold square. This ring is available in sizes 5.0 - 9.5, including half sizes. Special note: Because of the width 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 brass core/no nickel), and sterling silver (.925). 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.