Ring Size Guide
Not sure of your ring size? Follow the steps below to measure at home, then use our size chart to find your perfect fit.
How to Measure Your Ring Size
Method 1 — Measure a Ring You Already Own
- Use a ring that fits the intended finger well.
- Place it flat on a ruler and measure the internal diameter (inside edge to inside edge) in millimetres.
- Find that measurement in the diameter column of our size chart below.
Method 2 — Measure Your Finger
- Cut a thin strip of paper or use a piece of string.
- Wrap it snugly around the base of the finger you intend to wear the ring on.
- Mark where the paper overlaps, then lay it flat against a ruler.
- Note the length in millimetres — this is your circumference.
- Find that measurement in the circumference column of our size chart below.
Tips for an Accurate Measurement
- Measure at the end of the day — fingers are slightly larger in the evening and in warm temperatures.
- If your knuckle is larger than the base of your finger, measure both and choose a size in between.
- Measure the specific finger you plan to wear the ring on — ring finger sizes differ between hands.
- If you are between two sizes, we recommend sizing up.
International Ring Size Chart
| Diameter (mm) | Circumference (mm) | UK / AU | US / CA | EU / IT / ES | FR / RU | JP / CN |
|---|---|---|---|---|---|---|
| 14.1 | 44.2 | F | 3 | 44 | 44 | 3 |
| 14.5 | 45.5 | G | 3½ | 45.5 | 45.5 | 4 |
| 14.9 | 46.8 | H | 4 | 47 | 47 | 6 |
| 15.3 | 48.0 | I | 4½ | 48 | 48 | 7 |
| 15.7 | 49.3 | J | 5 | 49 | 49 | 9 |
| 16.1 | 50.6 | K | 5¼ | 50.5 | 50.5 | 10 |
| 16.5 | 51.9 | L | 5¾ | 52 | 52 | 11 |
| 16.9 | 53.1 | M | 6¼ | 53 | 53 | 13 |
| 17.3 | 54.4 | N | 6¾ | 54 | 54 | 14 |
| 17.7 | 55.7 | O | 7¼ | 55.5 | 55.5 | 15 |
| 18.1 | 57.0 | P | 7¾ | 57 | 57 | 17 |
| 18.5 | 58.3 | Q | 8¼ | 58 | 58 | 18 |
| 18.9 | 59.5 | R | 8¾ | 59.5 | 59.5 | 20 |
| 19.4 | 60.8 | S | 9¼ | 61 | 61 | 21 |
| 19.8 | 62.1 | T | 9¾ | 62 | 62 | 22 |
| 20.2 | 63.4 | U | 10¼ | 63 | 63 | 24 |
| 20.6 | 64.7 | V | 10¾ | 64.5 | 64.5 | 25 |
| 21.0 | 66.0 | W | 11¼ | 66 | 66 | 27 |
| 21.4 | 67.2 | X | 11¾ | 67 | 67 | 28 |
| 21.8 | 68.5 | Y | 12¼ | 68.5 | 68.5 | 29 |
| 22.2 | 69.8 | Z | 12¾ | 70 | 70 | 31 |
All measurements are approximate. If you are between sizes, we recommend sizing up for comfort. Band width can affect fit — wider bands tend to fit more snugly.
Need Help?
If you are still unsure of your size or would like advice before ordering, contact us at info@gerbero.com — we are happy to help.