Ring Size Guide
Finding your ring size at home is easy. Use one of the two methods below, then match your measurement to the chart.
Method 1: Measure a ring you already own
Take a ring that fits the finger you're sizing. Measure the inside diameter (edge to edge across the inside of the band) in millimeters, then find the closest match in the chart below.
Method 2: Measure your finger
- Wrap a thin strip of paper or string around the base of your finger.
- Mark where the end overlaps.
- Lay it flat and measure the length in millimeters. That's your circumference.
- Find the closest match in the chart below.
US Ring Size Chart
| US Size | Inside Diameter (mm) | Circumference (mm) |
|---|---|---|
| 4 | 14.9 | 46.8 |
| 4.5 | 15.3 | 48.0 |
| 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 | 18.1 | 57.0 |
| 8.5 | 18.5 | 58.3 |
| 9 | 18.9 | 59.5 |
| 9.5 | 19.4 | 60.8 |
| 10 | 19.8 | 62.1 |
| 10.5 | 20.2 | 63.4 |
| 11 | 20.6 | 64.6 |
| 11.5 | 21.0 | 65.9 |
| 12 | 21.4 | 67.2 |
| 12.5 | 21.8 | 68.5 |
| 13 | 22.2 | 69.7 |
Tips for the best fit
- Measure at the end of the day, when your fingers are at their largest.
- Avoid measuring when your hands are cold, since fingers shrink in the cold.
- Make sure the ring can slide over your knuckle.
- If you're between sizes, or choosing a wide band (like our men's eternity bands), go up half a size.
- Buying a surprise engagement ring? Borrow a ring your partner wears on that finger and use Method 1.
Still unsure? Message us on Instagram @mar_thejeweler and we'll help you find the right size.