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💍 Ring Size Converter
Enter Ring Size
US Size
UK Size
EU Size
Japan Size
China Size
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Convert to All Standards
Or Enter Circumference (mm)
Calculate Sizes
Conversion Results
US Size
UK Size
EU Size
Japan Size
China Size
Circumference (mm)
Diameter (mm)
Notes:
Ring sizes vary by country and region
Measure your finger circumference in millimeters for the most accurate size
US sizes use numbers (5-13 for adults), UK sizes use letters (A-Z), EU sizes use numbers (40-70)
Measure your finger at the end of the day when it's slightly larger