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International Ring Sizes

Table of International Ring Size Equivalents

We size our rings to international size equivalents. Please contact us if you are interested in ordering from outside the US.

United States Standard
(Including Canada)

Average Diameter
In Inches

British
Equivalent

French
Equivalent

German
Equivalent

Japanese
Equivalent

Swiss
Equivalent

000

.390

-
-
-
-
-

00

.422

-
-
-
-
-

0

.454

-
-
-
-
-

1/2

-

A

-
-
-
-

3/4

-

A1/22

-
-
-
-

1

.487

B

-
-

1

-

1 1/4

-

B-1/2

-
-
-
-

1 1/2

.503

C

-
-
-
-

1 3/4

-

C-1/2

-
-
-
-

2

.520

D

41 1/2

13 1/2

2

1 1/2

2 1/4

-

D-1/2

-
-
-
-

2 1/2

.536

E

42 3/4

13 3/4

3

2 3/4

2 3/4

-

E-1/2

-
-
-
-

3

.553

F

44

14

4

4

3 1/8

-

F-1/2

-
-
-
-

3 3/8

-

G

45 1/4

-

5

5 1/4

3 1/2

.569

-
-

14 1/2

-
-

3 5/8

-

G-1/2

-
-

6

-

3 3/4

-

H

46 1/2

-
-

6 1/2

4

.585

H-1/2

-

15

7

-

4 1/4

-

I

47 3/4

-
-

7 3/4

4 1/2

.601

I-1/2

-

15 1/4

8

-

4 7/8

-

J

49

-
-

9

5

.618

J-1/2

-

15 3/4

9

-

5 1/8

-

K

50

-
-

10

5 3/8

-

K-1/2

-
-

10

-

5 1/2

.634

L

51 3/4

16

-

11 3/4

5 7/8

-

L-1/2

-
-

11

-

6

.650

M

52 3/4

16 1/2

12

12 3/4

6 1/4

-

M-1/2

-
-
-
-

6 1/2

.666

N

54

17

13

14

6 3/4

-

N-1/2

 
-
-
-

7

.683

O

55 1/4

17 1/4

14

15 1/4

7 1/4

-

O-1/2

-
-
-
-

7 1/2

.699

P

56 1/2

17 3/4

15

16 1/2

7 3/4

-

P-1/2

-
-
-
-

8

.716

Q

57 3/4

18

16

17 3/4

8 1/4

-

Q-1/2

-
-
-
-

8 1/2

.732

-
-

18 1/2

17

-

8 5/8

-

R

59

-
-

19

8 7/8

-

R-1/2

-
-
-
-

9

.748

-
-

19

18

-

9 1/8

-

S

60 1/4

-
-

20 1/4

9 3/8

-

S-1/2

-
-
-
-

9 1/2

.764

-
-

19 1/2

19

-

9 5/8

-

T

61 1/2

-
-

21 1/2

10

.781

T-1/2

-

20

20

-

10 1/4

-

U

62 3/4

-

21

22 3/4

10 1/2

.797

U-1/2

-

20 1/4

22

-

10 5/8

-

V

63 3/4

-
-

23 3/4

11

.814

V-1/2

-

20 3/4

23

-

11 1/8

-

W

65

-
-

25

11 3/8

-

W-1/2

-
-
-
-

11 1/2

.830

-
-

21

24

-

11 5/8

-

X

66 1/4

-
-

26 1/4

11 7/8

-

X-1/2

-
-
-
-

12

.846

Y

67 1/2

21 1/4

25

27 1/2

12 1/4

-

Y-1/2

-
-
-
-

12 1/2

.862

Z

68 3/4

21 3/4

26

28 3/4

12 3/4

-

Z-1/2

-
-
-
-

13

.879

-
-

22

27

-


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