CM to Ring Size Converter

Convert finger circumference measurements to international ring sizes

mm
Enter circumference in millimeters (35-80mm)

Understanding Ring Sizes

Key Concepts

1. Measurement Methods

  • Circumference measurement
  • Diameter measurement
  • String method
  • Ring sizer

2. Size Standards

  • US/Canada sizes
  • UK/Australia sizes
  • European sizes
  • Japanese sizes

International Size Comparison

Circumference (mm) US Size UK Size EU Size
49.0 5 J 49
52.0 6 L 52
54.0 7 N 54

Measurement Tips

For accurate ring size measurements:

  • Measure at room temperature
  • Measure at the end of day
  • Consider finger shape
  • Account for knuckle size
  • Measure multiple times