Every O’Gem ring is unique – this means every ring is made in one size. If you choose the ring that is made in a smaller size than you need, please write to us with your size, and we will fit the size for you (for free).
See below for rings sizing information. If you have any questions about determining your size, our Customer Care Specialists will be glad to assist you.
Ring Size Conversion Chart
| Inside Circumference | Inside Diameter | Ring Sizes | ||||
|---|---|---|---|---|---|---|
| mm | inches | mm | inches | USA, Canada | Europe | UK, Australia |
| 48.7 | 1.92 | 15.49 | 0.61 | 5 | 49 | J |
| 50.0 | 1.97 | 15.9 | 0.63 | 5.5 | 50 | K |
| 51.2 | 2.02 | 16.31 | 0.64 | 6 | 51 | L |
| 52.5 | 2.07 | 16.71 | 0.66 | 6.5 | 52 | M |
| 53.8 | 2.12 | 17.12 | 0.67 | 7 | 54 | N |
| 55.1 | 2.17 | 17.53 | 0.69 | 7.5 | 55 | O |
| 56.3 | 2.22 | 17.93 | 0.71 | 8 | 56 | P |
| 57.6 | 2.27 | 18.34 | 0.72 | 8.5 | 58 | Q |
| 58.9 | 2.32 | 18.75 | 0.74 | 9 | 59 | R |
| 60.2 | 2.37 | 19.15 | 0.75 | 9.5 | 60 | S |
| 61.4 | 2.42 | 19.56 | 0.77 | 10 | 61 | T |
| 62.7 | 2.47 | 19.96 | 0.79 | 10.5 | 63 | U |
| 64.0 | 2.52 | 20.37 | 0.80 | 11 | 64 | V |