Wrap a strip of paper or a soft measuring tape around the base of your finger
Mark where the ends meet
Measure the length in millimeters
Compare the measurement to a ring size chart
Measure your finger at the end of the day when it is largest
Measure the exact finger and hand you will wear the ring on
Check your size more than once for accuracy
Make sure the ring can slide over your knuckle comfortably
If you are between sizes, choose the larger size
Use a ring sizer tool for the most accurate result
If possible, try on rings in different sizes at a jewelry store