Customer care
Ring Size Guide
Our rings come in US sizes 5 to 13, including half sizes. A few minutes with this guide helps you get the right fit the first time.
Best way: have your finger sized at any local jeweler, usually free. Or measure a ring you already wear on the same finger, using the chart below. Between two sizes? Choose the larger one.
Option 1: Measure a ring you own
- Choose a ring that fits the finger you'll wear your FERDÉON ring on.
- Lay it flat on a ruler and measure the inside diameter in millimeters, edge to inside edge, across the widest point.
- Find the closest diameter in the chart below.
Option 2: Measure your finger
- Wrap a thin strip of paper or a piece of string around the base of your finger. It should be snug but still slide over your knuckle.
- Mark where the end overlaps, then lay it flat and measure the length in millimeters. That's your circumference.
- Find the closest circumference in the chart below. If you're between two sizes, choose the larger one.
Size chart
| US size | Inside diameter (mm) | Circumference (mm) | Diameter (inches) |
|---|---|---|---|
| 5 | 15.7 | 49.3 | 0.62 |
| 5½ | 16.1 | 50.6 | 0.63 |
| 6 | 16.5 | 51.9 | 0.65 |
| 6½ | 16.9 | 53.1 | 0.67 |
| 7 | 17.3 | 54.4 | 0.68 |
| 7½ | 17.7 | 55.7 | 0.70 |
| 8 | 18.1 | 57.0 | 0.71 |
| 8½ | 18.5 | 58.2 | 0.73 |
| 9 | 18.9 | 59.5 | 0.75 |
| 9½ | 19.4 | 60.8 | 0.76 |
| 10 | 19.8 | 62.1 | 0.78 |
| 10½ | 20.2 | 63.3 | 0.79 |
| 11 | 20.6 | 64.6 | 0.81 |
| 11½ | 21.0 | 65.9 | 0.83 |
| 12 | 21.4 | 67.2 | 0.84 |
| 12½ | 21.8 | 68.5 | 0.86 |
| 13 | 22.2 | 69.7 | 0.87 |
Tips for the right fit
- Measure at the end of the day, when your fingers are at their largest, and not when your hands are cold.
- Wide bands fit tighter. For our Veridian Signature Ring, Twisting Band, Signet Ring and Flat Brushed Band, consider going up half a size if you're between sizes.
- Large knuckles? Make sure the ring will slide over your knuckle, not just fit the base of your finger.
- Your dominant hand is often slightly larger, so measure the hand you'll actually wear the ring on.
- Printed sizers and string can be off by a little. A jeweler's sizing is the most accurate.
Still unsure?
Email us at concierge@ferdeon.com before you order and we'll help you choose. If the size isn't right, an unworn ring can be exchanged for a different size within 7 days of delivery, at your expense, as set out in our Shipping & Returns policy.