US Ring Size Chart
Measure the inner circumference of your finger in millimeters and match it to the size below.
| US Size | Circumference (mm) | Diameter (mm) |
|---|---|---|
| 7 | 54.5 mm | 17.3 mm |
| 8 | 56.5 mm | 18.1 mm |
| 9 | 58.5 mm | 18.9 mm |
How to Measure Your Ring Size
Method 1: Measure an Existing Ring
Take a ring that fits the intended finger. Measure the inner diameter (mm) and match it to the chart above.
Method 2: Measure Your Finger
Wrap a piece of string or paper around the base of your finger. Mark where it overlaps, then measure the length in mm. Divide by 3.14 to get the diameter, then match to the chart.
Method 3: Visit a Jeweler
For the most accurate measurement, visit any local jeweler to get professionally sized.
International Conversion
| US | UK / AU | EU | Japan |
|---|---|---|---|
| 7 | N | 54 | 11 |
| 8 | P | 56 | 13 |
| 9 | Q | 58 | 15 |
Tips
- Measure at the end of the day - fingers swell slightly during the day.
- Avoid measuring when cold - fingers shrink in cold weather.
- Your dominant hand may have slightly larger fingers - measure the specific finger.
- If between sizes, choose the larger size for comfort.