US Ring Size Guide
Find your best fit
Use a ring that already fits or measure your finger, then match the measurement to the closest US size below.
Option 1: Measure a ring
Choose a ring that fits the intended finger. Measure straight across the inside of the ring at its widest point. Match that number to Inside diameter.
Option 2: Measure your finger
Wrap a thin strip of paper around the base of the finger without pulling it tight. Mark the overlap, measure the length, and match it to Finger circumference.
| US size | Finger circumference (mm) | Inside diameter (mm) |
|---|---|---|
| US 4 | 47.7 | 15.2 |
| US 4.5 | 48.7 | 15.5 |
| US 5 | 49.9 | 15.9 |
| US 5.5 | 51.2 | 16.3 |
| US 6 | 52.1 | 16.6 |
| US 6.5 | 53.1 | 16.9 |
| US 7 | 55.6 | 17.7 |
| US 7.5 | 56.6 | 18.0 |
| US 8 | 57.5 | 18.3 |
| US 8.5 | 58.8 | 18.7 |
| US 9 | 59.7 | 19.0 |
Helpful fit tips
- Measure near the end of the day, when fingers are usually at their natural size.
- Warm hands give a more reliable measurement than very cold hands.
- If your measurement sits between two sizes, choose the larger size for a more comfortable fit.
- Measure the exact finger you plan to wear the ring on; left and right hands can differ.
Measurements are a fit reference and small production tolerances can occur.