This rigid square stack has five rings: 2 very thick silver, 1 thin silver and 2 thin gold bands. It's rigid, yet extremely comfortable due to its softly rounded edges. This ring is available in sizes 5.0 – 9.5, including all 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 size larger than your normal ring size. Materials: sterling and 14k gold fill (14k gold over a brass core, no nickel), hypoallergenic. This ring set is handmade in our California and New York production studios.