Material : Sterling silver , Nickel Free Silver : Rhodium over sterling silver Gold : Yellow gold/rose gold over sterling silver Stone : Swiss star cut cubic zirconia Casting size : Size S (7.6 x 3.2mm), Size M (9.0 x 4.0mm) Pattern : Left (S) / Right (R) / Left (M) / Right (M) Gauge : 16g Post Length :6mm as listing OR If prefer 8mm please leave MESSAGE when check out an order