Ring Size Conversion Table
Find your perfect fit
Here is a Ring Size Conversion Table to help convert between different sizing systems commonly used around the world:
| Inside Diameter (mm) | US / Canada | UK / Australia | Europe (EU) |
| 14.0 | 3 | F | 44 |
| 14.4 | 3.5 | G | 45.5 |
| 14.8 | 4 | H | 46.5 |
| 15.2 | 4.5 | I | 48 |
| 15.6 | 5 | J½ | 49.5 |
| 16.0 | 5.5 | K½ | 50.5 |
| 16.5 | 6 | L½ | 52 |
| 16.9 | 6.5 | M½ | 53 |
| 17.3 | 7 | N½ | 54 |
| 17.7 | 7.5 | O½ | 55.5 |
| 18.2 | 8 | P½ | 57 |
| 18.6 | 8.5 | Q½ | 58 |
| 19.0 | 9 | R½ | 59 |
| 19.4 | 9.5 | S½ | 60.5 |
| 19.8 | 10 | T½ | 61.5 |
| 20.2 | 10.5 | U½ | 62.5 |
| 20.6 | 11 | V½ | 64 |
| 21.0 | 11.5 | W½ | 65.5 |
| 21.4 | 12 | X½ | 66.5 |
| 21.8 | 12.5 | Z | 68 |
| 22.2 | 13 | Z+1 | 69 |
Tips for Measuring Your Ring Size
1. Measure at the Right Time
- Your fingers can swell or shrink due to temperature or time of day.
- Measure your finger at the end of the day when it’s warm, for the most accurate size.
2. Measure the Finger You’ll Wear the Ring On
- Each finger—and even each hand—can be slightly different in size.
- Always measure the exact finger where the ring will be worn.
3. Use a Ring Sizer or a Printable Chart
- The most accurate method is using a plastic or metal ring sizer.
- You can also print a ring size chart and compare it with a ring that fits you well.
4. Avoid Measuring Cold Fingers
- Cold fingers shrink and may lead to choosing a size that’s too small.
5. Check the Fit
- The ring should slide on easily and come off with slight resistance over the knuckle.
- If your knuckle is much larger than the base of your finger, measure both and choose a size in between.
6. Try Multiple Times
- For best results, measure your finger 2–3 times to ensure consistency.
7. Account for Band Width
- Wider bands may require a slightly larger size for comfort.
- If you’re buying a wide ring, consider going half a size up.