1. Use a ring that fits the desired finger.
2. Measure the internal diameter of the ring (in mm). Ensure your ruler starts at the 0mm mark.
| Internal Diameter (mm) |
US/CAN | UK/AUS |
|---|---|---|
| 13.3mm | 2 | D |
| 14.1mm | 3 | F |
| 14.9mm | 4 | H |
| 15.7mm | 5 | J |
| 16.5mm | 6 | N |
| 17.3mm | 7 | P |
| 18.1mm | 8 | R |
| 19mm | 9 | T |
1. Cut a thin strip of paper, ensure it's not too wide.
2. Wrap a strip of paper around your finger where you’d like your ring to be. Make sure that the paper is pulled snug to your finger (the tighter the better) to find your best fit.
3. Mark the spot where the paper meets and measure the distance with a ruler (mm).
| Circumference (mm) |
US/CAN |
|---|---|
| 41.6mm | 2 |
| 44.2mm | 3 |
| 14.9mm | 4 |
| 46.8mm | 4 |
| 49.3mm | 5 |
| 51.9mm | 6 |
| 54.4mm | 7 |
| 57.0mm | 8 |
| 59.5mm | 9 |