Best method: Visit a local jeweller to measure your finger or use a professional ring sizer at home for the most accurate fit.
Want a perfect fit? Use the methods below. Measure carefully and if you’re between sizes, choose the larger size or contact us for help. If you’d like, we can make a free digital mock-up and confirm the size before production.
Quick checklist before you measure
- Measure at the end of the day, fingers swell slightly during the day.
- Measure your dominant hand (it’s usually slightly bigger) if making a pair and measure the exact finger that will wear the ring.
- Consider knuckle size: if your knuckle is much larger than the base of your finger, measure both and choose a size that slides over the knuckle but fits snugly at the base.
- Thickness matters, for wide bands (+6 mm), consider going up half a size for comfort.
3 Easy ways to measure
1) Printable ring sizer (most accurate)
Download and print our ring sizer (make sure “scale: 100%” or “actual size” is selected when printing).
2) String or paper strip method
- Cut a thin strip of paper or use non-stretchy string about 10 cm long.
- Wrap it around the base of your finger where the ring will sit. Make sure it’s snug but not tight.
- Mark the point where the paper or string meets and measure the length with a ruler in millimetres (mm).
- Use the conversion table below to find your closest ring size.
3) Measure an existing ring
- Choose a ring that fits the intended finger well.
- Measure the inner diameter of the ring in millimetres (mm) — across the widest point from inside edge to inside edge.
- Use the table below to convert diameter or circumference to your ring size.
Conversion table (common sizes)
Below are common men’s and women’s sizes. EU size is the inner circumference in millimetres.
| US | Inner diameter (mm) | Inner circumference / EU (mm) |
|---|---|---|
| 4 | 14.86 | 46.7 |
| 4.5 | 15.29 | 48.0 |
| 5 | 15.70 | 49.3 |
| 5.5 | 16.10 | 50.6 |
| 6 | 16.51 | 51.9 |
| 6.5 | 16.92 | 53.1 |
| 7 | 17.35 | 54.5 |
| 7.5 | 17.75 | 55.8 |
| 8 | 18.19 | 57.1 |
| 8.5 | 18.53 | 58.2 |
| 9 | 18.89 | 59.3 |
| 9.5 | 19.41 | 61.0 |
| 10 | 19.84 | 62.3 |
| 10.5 | 20.18 | 63.4 |
| 11 | 20.68 | 65.0 |
| 11.5 | 21.05 | 66.1 |
| 12 | 21.49 | 67.5 |
| 12.5 | 21.87 | 68.7 |
| 13 | 22.33 | 70.1 |
Tips & troubleshooting
- If you measure between two sizes, choose the larger size for comfort (especially for wide rings).
- If the ring needs to slide over your knuckle, measure both the knuckle and the base of the finger; pick a size that balances both and consult us for advice.
- Don’t measure when your hands are cold — fingers shrink in cold temperatures.
- If you’re still unsure, send us a photo of your measuring strip or the inside of a ring and we’ll double-check before production.