Diamond Ring Sizer


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Ring Sizer

Measure Your Ring / Ring Size Converter

Measure and convert your ring size to the ring size used in other countries.

USA size	Diam. inch.	Diam. mm	Circum. mm

British	French	German	Japanese	Swiss

How to determine your ring size

Wrap a piece of string or a strip of paper around your finger.
Mark the point where the two ends meet.
Measure the string or paper against a ruler to get the circumference of your finger.
Divide that by 3.14 to get the diameter of your finger.
Look up your ring size using the form above.