1. Find a piece of string.
2. Wrap it around the base of your finger.
3. Use a pen to mark the point on the string where it overlaps to form a complete circle.
4. With a ruler, measure the length from the starting end of the string to the pen mark.
5. Use the measurement and the chart below to determine your ring size.

Ring Size (USA)

Measured Length - Inches

Measured Length - MM

3 1 11/16 44
4 1 13/16 46.5
5 1 15/16 49
6 2 1/16 51.5
7 2 3/16 54
8 2 5/16 56.6
9 2 7/16 59.1
10 2 9/16 61.6
11 2 11/16 64.1
12 2 13/16 66.6
13 2 15/16 69.1