Finding the perfect ring size is just as important as choosing the diamond itself. At Elarion, we believe every detail matters — your ring should not only shine brilliantly but fit flawlessly.
Whether you’re selecting a timeless engagement ring, a luxury diamond band, or preparing a surprise gift, our step-by-step guide makes it simple and precise.
Our UK-based sizing follows the traditional letter scale. Use the chart below to convert between UK, US, and EU sizes, or to match your measurements in millimetres.
Tip: Save this chart or screenshot for easy reference.
| UK Size | Inside Circumference (mm) | Inside Diameter (mm) | US/Canada Size | EU Size |
|---|---|---|---|---|
| F | 44.2 | 14.1 | 3 | 44 |
| G | 45.5 | 14.5 | 3.5 | 45.5 |
| H | 46.8 | 14.9 | 4 | 47 |
| I | 48.0 | 15.3 | 4.5 | 48 |
| J | 49.3 | 15.7 | 5 | 49.5 |
| K | 50.6 | 16.1 | 5.5 | 50.5 |
| L | 51.9 | 16.5 | 6 | 52 |
| M | 53.1 | 16.9 | 6.5 | 53.5 |
| N | 54.4 | 17.3 | 7 | 54.5 |
| O | 55.7 | 17.7 | 7.5 | 56 |
| P | 57.0 | 18.1 | 8 | 57.5 |
| Q | 58.3 | 18.5 | 8.5 | 58.5 |
| R | 59.5 | 18.9 | 9 | 60 |
| S | 60.8 | 19.3 | 9.5 | 61.5 |
| T | 62.1 | 19.7 | 10 | 62.5 |
| U | 63.4 | 20.1 | 10.5 | 64 |
| V | 64.6 | 20.5 | 11 | 65.5 |
| W | 65.9 | 20.9 | 11.5 | 67 |
| X | 67.2 | 21.3 | 12 | 68.5 |
| Y | 68.5 | 21.7 | 12.5 | 70 |
| Z | 69.7 | 22.1 | 13 | 71.5 |
When you purchase with Elarion, we ensure your ring fits perfectly:
Book a free consultation with our diamond experts to confirm your size.
Enjoy complimentary resizing, secure worldwide delivery, and luxury packaging.
