Conversion table - ring size

Circumference
in mm

Diameter in mm

England

USA / Canada

France

41,5

13,4

D

2

1,5

43,0

13,8

E

2-

3,0

44,5

14,2

F

3

4,5

45,5

14,6

G

3-

5,5

47,0

15,0

H

4

7,0

48,0

15,4

I

4-

8,0

49,5

15,8

J

5

9,5

50,5

16,2

K

5-

10,5

52,0

16,5

L

6

12,0

53,5

17,0

M

6-

13,5

54,5

17,5

N

7

14,5

56,0

17,8

O

7-

16,0

56,5

18,0

P

8

16,5

58,5

18,5

Q

8-

18,5

59,5

19,0

R

9

19,5

61,0

19,5

S

9-

21,0

62,5

19,9

T

10

22,5

63,5

20,3

U

10-

23,5

65,0

20,5

V

11

25,0

66,0

21,0

W

11-

26,0

67,5

21,5

X

12

27,5

69,0

22,0

Y

12-

29,0

70,0

22,5

Z

13

30,0