Ring Size Guide
Find Your Perfect Fit
A proper fit makes all the difference. For the most accurate sizing, we recommend having your finger measured by a local jeweler before ordering.
If you have any questions about sizing, we’re always happy to help. Contact us at customercare@geoffthomasdesigns.com.
US Ring Size Chart
| US Size | Inner Diameter (mm) | Circumference (mm) |
|---|---|---|
| 5 | 15.7 | 49.3 |
| 5.5 | 16.1 | 50.6 |
| 6 | 16.5 | 51.9 |
| 6.5 | 16.9 | 53.1 |
| 7 | 17.3 | 54.4 |
| 7.5 | 17.7 | 55.7 |
| 8 | 18.2 | 57.2 |
| 8.5 | 18.6 | 58.4 |
| 9 | 19.0 | 59.7 |
| 9.5 | 19.4 | 61.0 |
| 10 | 19.8 | 62.2 |
| 10.5 | 20.2 | 63.5 |
| 11 | 20.6 | 64.8 |
| 11.5 | 21.0 | 66.0 |
| 12 | 21.4 | 67.3 |
| 12.5 | 21.8 | 68.6 |
| 13 | 22.2 | 69.8 |
| 13.5 | 22.6 | 71.1 |
| 14 | 23.0 | 72.4 |
| 14.5 | 23.4 | 73.6 |
| 15 | 23.8 | 74.9 |
| 15.5 | 24.2 | 76.2 |
| 16 | 24.6 | 77.4 |
Special Orders for Sizes Above 16
Large and hard-to-find ring sizes are part of what we do. Sizes above 16 are available by special order and are nonreturnable.
After you place your order, we’ll send you a custom ring sizing kit to help confirm your fit before we make your ring. Your order also includes one size adjustment within 30 days of receiving your finished ring. If the fit needs refining, contact us during that time and we’ll help arrange the adjustment.
Tips for Choosing Your Size
- Wide bands: Wider and heavier ring styles can feel more snug than narrow bands. Depending on the design, you may prefer approximately a quarter size larger.
- Knuckles: If your knuckle is noticeably larger than the base of your finger, choose a size that passes comfortably over the knuckle without feeling excessively loose once in place.
- Dominant hand: Fingers on your dominant hand can be slightly larger, so measure the specific finger and hand where you plan to wear the ring.
- When to measure: Finger size can change throughout the day. For the most representative measurement, measure when your hands are at a comfortable, normal temperature.
How to Measure at Home
For a rough at-home measurement, you’ll need a thin strip of paper, a pen, and a ruler marked in millimeters.
- Wrap the paper snugly around the base of the finger where you plan to wear the ring.
- Mark the point where the paper overlaps.
- Lay it flat and measure the length in millimeters. This is your finger circumference.
- Compare that measurement with the chart above.
At-home measurements are useful as a guide, but for higher-value or made-to-order rings, we strongly recommend confirming your size with a professional jeweler before ordering.
We also offer resizing on select rings and can typically size eligible pieces up by as much as one full size. We are not able to size rings down.