Ring Size Comparison Table
Compare ring sizes across different countries and systems
International Ring Size Comparison Table
| US | UK | EU | JP | IN | AU | CA | ZA | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|---|---|---|---|---|
| 3 | F | 44 | 4 | 4 | F | 3 | F | 14.10 | 44.30 |
| 3.5 | G | 45 | 5 | 5 | G | 3.5 | G | 14.50 | 45.55 |
| 4 | H | 47 | 7 | 7 | H | 4 | H | 14.90 | 46.81 |
| 4.5 | I | 48 | 8 | 8 | I | 4.5 | I | 15.30 | 48.07 |
| 5 | J | 49 | 9 | 9 | J | 5 | J | 15.70 | 49.32 |
| 5.5 | K | 50 | 10 | 10 | K | 5.5 | K | 16.10 | 50.58 |
| 6 | L | 51 | 11 | 11 | L | 6 | L | 16.50 | 51.84 |
| 6.5 | M | 52 | 12 | 12 | M | 6.5 | M | 16.90 | 53.09 |
| 7 | N | 54 | 13 | 13 | N | 7 | N | 17.30 | 54.35 |
| 7.5 | O | 55 | 14 | 14 | O | 7.5 | O | 17.70 | 55.61 |
| 8 | P | 57 | 16 | 16 | P | 8 | P | 18.10 | 56.86 |
| 8.5 | Q | 58 | 17 | 17 | Q | 8.5 | Q | 18.50 | 58.12 |
| 9 | R | 59 | 18 | 18 | R | 9 | R | 18.90 | 59.38 |
| 9.5 | S | 60 | 19 | 19 | S | 9.5 | S | 19.30 | 60.63 |
| 10 | T | 62 | 20 | 20 | T | 10 | T | 19.70 | 61.89 |
| 10.5 | U | 63 | 21 | 21 | U | 10.5 | U | 20.10 | 63.15 |
| 11 | V | 64 | 22 | 22 | V | 11 | V | 20.50 | 64.40 |
| 11.5 | W | 65 | 23 | 23 | W | 11.5 | W | 20.90 | 65.66 |
| 12 | X | 67 | 24 | 24 | X | 12 | X | 21.30 | 66.92 |
| 12.5 | Y | 68 | 25 | 25 | Y | 12.5 | Y | 21.70 | 68.17 |
| 13 | Z | 69 | 26 | 26 | Z | 13 | Z | 22.10 | 69.43 |
Frequently Asked Questions
General Questions
4 questions
The table is based on standard sizing charts, but actual sizes may vary by manufacturer or region. Always confirm your size with a professional jeweler before purchasing.
Yes, you can find your known ring size in one system and read across to see the equivalent in other systems. Use the unit toggle to view diameter and circumference in mm or inches.
If your exact size is not listed, choose the closest available size or consult a jeweler for a custom fit.
Not all sizing systems have a direct equivalent for every size. A '-' means no standard equivalent exists for that system at that size.