Ring Size Converter
Instantly convert ring sizes between US, UK, EU, and diameter (mm) β plus a handy measurement guide
π Convert Ring Size
π‘ Measuring Tips
- β Measure at the end of the day when fingers are largest
- β Wrap string around the base of your finger
- β Mark overlap point and measure in mm
- β Divide by 3.14 to get diameter
- β Measure 3-4 times for accuracy
- β Wider bands may need Β½ size larger
π International Ring Size Chart
| US | UK | EU | Dia (mm) |
|---|
Click any row or use the converter above β your size will be highlighted in the chart
π How to Measure at Home
Wrap a piece of string or paper strip around the base of your finger
Use a pen to mark where the string overlaps
Measure the length with a ruler in millimeters (mm)
Divide by 3.14 (Ο) to get the diameter
Use the converter to find your size in any system!
π Related Tools
π Learn More About Ring Sizes
Complete guide with size charts and pro tips
Read Ring Size Guide β