Ring size guide
How to find your ring size and convert between systems.
Updated 31 July 2026
Overview
Ring size comes down to the inside diameter (or circumference) of the ring in millimetres. Measure once and you know your size for any ring on Javern.
Measure your finger at home
Method 1 — string or thin paper:
- Cut a thin strip of paper or take a piece of string.
- Wrap it snugly around the base of the finger you want the ring for.
- Mark where the ends meet.
- Measure that length in mm — that's your finger circumference.
Method 2 — an existing ring:
- Lay the ring flat on a ruler.
- Measure the inside diameter (edge to edge across the middle) in mm.
Common sizes
| UK | US | Diameter (mm) | Circumference (mm) |
|---|---|---|---|
| G | 3½ | 14.0 | 44.0 |
| H | 4 | 14.8 | 46.5 |
| J | 5 | 15.7 | 49.3 |
| L | 6 | 16.5 | 51.9 |
| N | 7 | 17.3 | 54.4 |
| P | 8 | 18.2 | 57.0 |
| R | 9 | 19.0 | 59.5 |
| T | 10 | 19.8 | 62.1 |
Tips
- Measure at the end of the day — fingers are slightly larger.
- If you have big knuckles, size up so the ring fits over the knuckle.
- Weather matters: cold weather shrinks fingers.
- If you're between sizes, size up for wide-band rings and down for thin ones.
- Not sure? Message the Vendor before ordering.
Related
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