While the tools below provide a helpful starting point, nothing replaces being sized in person. We highly recommend visiting a local jeweler for a professional ring sizing before ordering — especially for wider bands, which tend to fit more snugly.
How to Measure at Home
Use a flexible measuring tape or a string to wrap around the base of your finger. Mark where the ends meet and measure the length in millimeters. Then use the table below to find your size.
| US Ring Size | Circumference (mm) |
|---|---|
| 4 | 46.8 |
| 4.5 | 48.0 |
| 5 | 49.3 |
| 5.5 | 50.6 |
| 6 | 51.9 |
| 6.5 | 53.1 |
| 7 | 54.4 |
| 7.5 | 55.7 |
| 8 | 57.2 |
| 8.5 | 58.4 |
| 9 | 59.7 |
| 9.5 | 61.0 |
| 10 | 62.2 |
| 10.5 | 63.5 |
| 11 | 64.7 |
Tips for an Accurate Measurement
- Measure at the end of the day when fingers are slightly larger
- Avoid measuring when fingers are cold or swollen
- Measure the specific finger you plan to wear the ring on
- If you fall between two sizes, size up for comfort
- Wide bands fit more snugly — consider going up half a size
Printable Ring Sizer
Prefer a hands-on approach? Download our printable ring sizer template and follow the included instructions.
⚠️ Print at 100% scale — do not use "Fit to Page" or measurements will be inaccurate.