1
Find a piece of string or strip of paper no wider than 3/4".
2
Wrap it around the base of the appropriate finger.
3
Use a pen to mark the point on the string/paper where it overlaps, forming a complete circle.
4
With a ruler, measure the length from the starting end of the string/paper to the pen mark.
5
Use this measurement and the chart to the right to determine your ring size.