Ring Size Table

AU SIZE

US SIZE

EU SIZE

CIRCUMFERENCE (MM)

DIAMETER (MM)

5

49¼

49.30

15.70

5.5

50½

50.60

16.10

6

51¾

51.90

16.51

6.5

53¼

53.10

16.92

7

54½

54.40

17.32

7.5

55¾

55.40

17.73

8

57

57.00

18.13

8.5

58¼

58.30

18.54

9

59½

59.50

18.95

9.5

60¾

60.80

19.35

10

62¼

62.10

19.76

10.5

63½

63.40

20.17

11

64¾

64.60

20.57

11.5

66

65.90

20.98

12

67¼

67.20

21.39

12.5

68½

68.50

21.79

13

70

69.70

22.20