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Welcome to Cool Rings Direct!

Store categories

Online Conversion - Ring Size Conversion

International Ring Size Conversion Chart

USA size Diam. inch. Diam. mm Circum. mm
British French German Japanese Swiss

Select a ring size in one category, the rest will change to match.

How to determine your ring size

  1. Cut a strip of paper the desired width of the ring and wrap it around your finger.
  2. Mark the point where the end meets the srtip.
  3. Measure the paper against a ruler to get the circumference of your finger in mm.
  4. Look up the measurement on the chart to find your size.
  5. Please contact us for help if needed.