How to determine your ring size

  • Find a piece of string.
  • Wrap it around the approximate position on the finger where the ring will be. Make sure the string is taut.
  • Use a marker to mark where the string overlaps, forming a complete circle.
  • Measure the length from the starting end of the string to the pen mark using a ruler with a millimeter scale.
  • Check this measurement with the below chart to determine your ring size.
Ring Size Circumference(mm) Diameter(mm)

4.0

46.5

14.801

4.5

47.8

15.215

5.0

49.0

15.597

5.5

50.3

16.011

6.0

51.5

16.393

6.5

52.8

16.807

7.0

54.0

15.188

7.5

55.3

15.602

8.0

56.6

18.016

8.5

57.8

18.398

9.0

59.1

18.812

9.5

60.3

19.194

10.0

61.6

19.608

10.5

62.8

19.989

11.0

64.1

15.404

11.5

65.3

15.786

12.0

66.6

21.199

12.5

67.9

21.613

13.0

69.1

21.995

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