How to determine your ring size:

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

Ring Size    Inches         mm
4                 1 13/16         46.5
4 ½             1 7/8             47.8
5                 1 15/16         49
5 ½             2                   50.3
6                 2 1/16           51.5
6 ½             2 1/8             52.8
7                 2 3/16           54
7 ½             2 1/4             55.3
8                 2 5/16           56.6
8 ½             2 3/8             57.6
9                 2 7/16           59.1
9 ½             2 1/2             60.3
10               2 9/16           61.6
10 ½           2 5/8             62.8
11               2 11/16         64.1
11 ½           2 3/4             65.3
12               2 13/16         66.6
12 ½           2 7/8             67.9
13               2 15/16         69.1