Ring sizes

Inner diameter (mm)

Ring size DE

Ring size US

15.9

50

5.3 (5)

16.2

51

5.7 (5-)

16.5

52

6.1 (6)

16.8

53

6.4 (6)

17.2

54

6.8 (6-)

17.5

55

7.2 (7)

17.8

56

7.6 (7-)

18.1

57

8.0 (7-)

18.4

58

8.4 (8)

18.8

59

8.7 (8-)

19.1

60

9.1 (9)

19.4

61

9.5 (9-)

19.7

62

9.9 (9-)

20.1

63

10.3 (10)

20.3

64

10.7 (10-)

20.6

65

11.0 (11)

21

66

11.4 (11)

21.3

67

11.8 (11-)

21.6

68

12.2 (12)

21.9

69

12.6 (12-)

22.3

70

13.0 (13)