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Inside
Diameter MM
Inside
Diameter Inches
USA/ Canada/
Mexico Ring Size
UK/ Ireland/ Australia/
New Zealand/ South Africa
Ring Size
Germany/ France
Ring Size
Spain/ Italy
Ring Size
Japan/ China/ India/ South America
Ring Size

15 mm

 

0.59"

 

4

 

H

 

46.8

 

6,5

 

7

 

15.3 mm

 

0.60"

 

4.5

 

I

 

48

 

8

 

8

 

15.6 mm

 

0.62"

 

5

 

J

 

49.3

 

9,5

 

9

 

16.2 mm

 

0.63"

 

5.5

 

K

 

50.6

 

10,5

 

10

 

16.6 mm

 

0.65"

 

6

 

L

 

51.9

 

12

 

11

 

16.9 mm

 

0.67"

 

6.5

 

M

 

53.1

 

13,5

 

13

 

17.2 mm

 

0.68"

 

7

 

N

 

54.4

 

14,5

 

14

 

17.8 mm

 

0.70"

 

7.5

 

O

 

55.7

 

16

 

15

 

18.1 mm

 

0.71"

 

8

 

P

 

57

 

17

 

16

 

18.5 mm

 

0.73"

 

8.5

 

Q

 

58.3

 

18,5

 

17

 

19.1 mm

 

0.75"

 

9

 

R

 

59.5

 

20

 

18

 

19.4 mm

 

0.76"

 

9.5

 

S

 

60.8

 

21

 

19

 

19.7 mm

 

0.78"

 

10

 

T

 

62.1

 

22,5

 

20

 

20.4 mm

 

0.79"

 

10.5

 

U

 

63.4

 

23,5

 

22

 

20.7 mm

 

0.81"

 

11

 

V

 

64.6

 

25

 

23

 

21.0 mm

 

0.83"

 

11.5

 

W

 

65.9

 

26

 

24

 

21.6 mm

 

0.84"

 

12

 

X

 

67.2

 

27,5

 

25

 

22.0 mm

 

0.86"

 

12.5

 

Y

 

68.5

 

29

 

26

 

22.3 mm

 

0.87"

 

13

 

Z

 

69.7

 

30

 

27

 

22.9 mm

 

0.89"

 

13.5

 

Z+2

 

71

 

32

 

-

 

23.2 mm

 

0.91"

 

14

 

Z+3

 

72.3

 

33

 

-

 

23.6 mm

 

0.92"

 

14.5

 

Z+4

 

73.6

 

34,5

 

-

 

24.0 mm

 

0.94"

 

15

 

Z+5

 

74.8

 

35

 

-