International Ring Size Converter Tool
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.
Popular Size Conversions
Quick reference charts for the most common ring size conversions between different international 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
Understanding average ring sizes can help you get a baseline for conversions:
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 More Ring Sizing Tools?
For complete reference tables and additional sizing resources, explore our comprehensive collection:
- International Ring Size Conversion Chart - Complete reference table with all sizing systems
- Ring Size Calculator - Calculate your size from measurements
- Actual Size Chart - Visual ring size chart for your screen
- Printable Ring Sizer - Download and print for physical measurements
Find Your Perfect Ring Size
For the most accurate ring sizing, combine multiple measurement methods and consider professional fitting.