International Ring Size Converter
Our ring size converter tool helps you translate between different international sizing systems. Whether you're shopping from an international retailer or need to understand the equivalent of your current ring size in another system, our converter provides accurate conversions.
Convert Your Ring Size
Your conversion results will appear here.
How to Use the Ring Size Converter
- Enter your ring size in the "Enter Size" field. For example, enter 6 for US size 6, M for UK size M, or 52 for European size 52.
- Select the sizing system that matches your entered size from the dropdown menu.
- Click "Convert" to see your size converted to all other international sizing systems.
US to UK Conversion
| US Size | UK Size |
|---|---|
| 3 | F |
| 4 | H½ |
| 5 | J½ |
| 6 | M |
| 7 | O |
| 8 | Q |
| 9 | R¾ |
| 10 | T½ |
| 11 | V½ |
| 12 | X½ |
US to European Conversion
| US Size | European Size |
|---|---|
| 3 | 44 |
| 4 | 47¾ |
| 5 | 49¾ |
| 6 | 52¾ |
| 7 | 55¼ |
| 8 | 57¾ |
| 9 | 60¼ |
| 10 | 62¾ |
| 11 | 65 |
| 12 | 67¼ |
Understanding Ring Size Measurements
Ring sizes are based on two primary measurements:
Inside Diameter
The distance across the inner circle of a ring. In the US, a size 6 ring has an inside diameter of approximately 16.5mm.
Inside Circumference
The distance around the inner edge of a ring. In the US, a size 6 ring has an inside circumference of approximately 51.9mm.
Different countries use different standards for ring sizing:
- US/Canada: Numerical sizes (4, 5, 6, etc.)
- UK/Australia: Alphabetical sizes (J, K, L, etc.)
- Europe: Numerical sizes based on circumference in mm (50, 52, 54, etc.)
- Japan: Numerical sizes from 1-27
Common Ring Sizes Reference
Women's Common Sizes
- Average size: US 6 / UK M / EU 52¾
- Small: US 4-5 / UK H½-J½ / EU 47-50
- Large: US 8-9 / UK Q-R¾ / EU 57-60
Men's Common Sizes
- Average size: US 9 / UK R¾ / EU 60¼
- Small: US 7-8 / UK O-Q / EU 55-58
- Large: US 10-12 / UK T½-X½ / EU 62-67
Need a Complete Ring Size Chart?
For a comprehensive reference table showing all international ring size conversions, visit our International Ring Size Conversion Chart.