We recommend that you determine your proper ring size before ordering. First decide what finger you prefer to wear the shell ring on. Personally, I prefer and find it most comfortable to wear my shell ring on my index finger with the lip side of the shell facing out (refer to pictures with my model). The rings are chunky, so take that into consideration. Have a professional jeweler measure your ring size with a "ring-sizer," a set of steel guage-rings. Have your finger measured at several times of the day, because finger sizes can change due to factors such as temperature (heat causes swelling), humidity, water-retention, exercise, etc. Also, your finger is the largest diameter at the end of the day. We can exchange a size or re-size your ring if it is too small, just contact us at orders@kristijones.com