Place your ring over the nearest size circle. The inner edge of the ring should align with the outer edge of the circle. If your ring appears to fit between two sizes, buy the larger size.
How to Measure
The steps to determine your ring size:
Step1: Wrap a piece of string or a strip of paper around your finger.
Step2: Mark the point where the two ends meet.
Step3: Measure the string or paper against a ruler to get the circumference of your finger.
Step4: Divide that by 3.14 to get the diameter of your finger.
Step5: Look up your ring size using the form above.
International Ring Size Conversion Chart