Ring Size Converter

Convert between US, UK, European, Japanese ring sizes and diameter measurements with precision

Accurate Mobile Friendly Printable

Ring Size Converter

Input Size

Converted Sizes

Enter a size above to see conversions

Printable Ring Sizer

Get a physical ring size chart for accurate measurements

Ring Size Chart Preview (US Sizes)

How to Use

Measuring Your Ring Size

  • Use a string or paper strip
  • Wrap around finger at base
  • Mark where it overlaps
  • Measure length in millimeters
  • Use our converter to find your size

Size Systems

🇺🇸
US: Numeric (3-15)
🇬🇧
UK: Letters (A-Z)
🇪🇺
EU: Numeric (37-77)
🇯🇵
JP: Numeric (1-27)
📏
mm: Diameter measurement