Ring Size Converter

Stop guessing your ring size. Enter your finger measurement to find your perfect fit in US, UK, and European standards.

Wrap a piece of string around your finger and measure it.
Primary Size (US)
7
N 1/2 UK / AU
54.4 Europe
17.3 mm Diameter

How to measure at home

I genuinely believe that the "string test" is the best way to find your size without a pro tool. Wrap a thin piece of string or paper around the base of your finger. Mark where it overlaps, then measure that distance against a ruler. This gives you the *circumference*, which is the most accurate measurement for our calculator.

Pro Tip: Measure your fingers at the end of the day when they are at their largest. Don't measure when your hands are cold, as your fingers can be up to half a size smaller than usual!

Size Guide:

  • US Sizes: Range from 3 to 13.5 (including half sizes).
  • UK Sizes: Use letters (A to Z).
  • EU Sizes: Usually match the circumference in millimeters (e.g., 54mm = Size 54).