Don't know your ring size? Get a strip of paper at least six inches long and wrap it around the base of your finger. Make sure it’s snug, but not too tight. Mark the point on the piece of paper where it overlaps to form a circle. Then, measure the length of that strip. See the chart below.

 

Length of strip (mm)

Size (US)

46.8

4

49.3

5

51.9

6

54.4

7

57.0

8

59.5

9