Ring Sizing Chart

1) To measure by Internal Diameter (mm), measure the diameter of an existing ring using a ruler and compare to ring sizing options
OR
2) To measure by Internal Circumference (mm), take a string and wrap around the finger of interest, then measure the string against a ruler and compare to ring sizing options

US/CDN Ring Size

Internal Diameter (mm)

Internal Circumference (mm)

3

14.1

44.3

4

14.9

46.8

4.5

15.3

48

5

15.7

49.3

5.5

16.1

50.6

6

16.5

51.9

6.5

16.9

53.1

7

17.3

54.4

7.5

17.7

55.7

8

18.1

57.0

8.5

18.5

58.3

9

19.0

59.5

9.5

19.4

60.8

10

19.8

62.1

10.5

20.2

63.4

11

20.6

64.6

11.5

21.0

65.9

12

21.4

67.2

12.5

21.8

68.5

13

22.2

69.7