International Ring Sizing Chart

Diameter
(mm)		 United States & Canada Europe UK & Australia Singapore & Japan China,Hong Kong, India Switzerland,  Netherlands, Spain, Italy

11.53

00

 36

-




11.95

1/2

38

A




12.18

3/4

38

A 1/2




12.37

01

 39

B

1



12.60

1 1/4

40

B1/2




12.78

1 1/2

 40

C




13.00

1 3/4

41

C 1/2




13.21

02

42

D

2


1 1/2

13.41

2  1/4

42

D 1/2




13.61

2 1/2

43

E

3


2 3/4

13.83

2 3/4

43

E 1/2




14.1

3

44

F 1/2

4

6

4

14.3


45

G

5


5 1/4

14.5

3.5


G 1/2


7


14.7


46

H

6


6 1/2

14.9

4

47

H 1/2

7

8


15.1



I



7 3/4

15.3

4.5

48

I 1/2

8

9


15.5



J


10

9

15.7

5

49

J 1/2

9



15.9


50

K


11

10

16.1

5.5


K 1/2

10



16.3


51

L


12

11 3/4

16.5

6

52

L1/2

11

13

12 3/4

16.7



M

12



16.9

6.5

53

M 1/2

13

14

14

17.1


N




17.3

7

54

N 1/2

14

15

15 1/4

17.5


55

O


16


17.7

7.5


O 1/2

15


16 1/2

17.9


56

P


17


18.1


57

P 1/2

16


17  3/4

18.2





18


18.3


Q




18.5

8.5

58

Q 1/2

17



18.8


59

R


19

19

19



R 1/2

18

20


19.2


60

S


20 1/4

19.4

9.5

61

S 1/2

19

21


19.6



T



21 1/2

19.8

10

62

T 1/2

20

22


20



U

21



20.2

10.5

63

U 1/2

22

23

22 3/4

20.4


64

V


24


20.6

11


V  1/2

23



20.8


65

W


25

25

21

11.5

66

W 1/2

24



21.2



X


26


21.4

12

67

X 1/2

25

27

27 1/2

21.6


Y




21.8

12.5

68

Z

26


28 3/4

22


69

Z 1/2




22.2

13

70


27



22.4



Z+1




22.6

13.5


Z+2