American

French / Japanese

English

Metric

1/2

-

A

37.8252

3/4

-

A 1/2

38.4237

1

-

B

39.0222

1 1/4

-

B 1/2

39.6207

1 1/2

-

C

40.2192

1 3/4

-

C 1/2

40.8177

2

1

D

41.4162

2 1/4

2

D 1/2

42.0147

2 1/2

E

42.6132

2 3/4

3

E 1/2

43.2117

3

4

F

43.8102

3 1/4

-

F 1/2

44.4087

3 1/4

5

G

45.0072

3 1/2

-

G 1/2

45.6057

3 3/4

6

H

46.2042

4

-

H 1/2

46.8027

4 1/4

7

I

47.4012

4 1/2

8

I 1/2

47.9997

4 3/4

-

J

48.5982

5

9

J 1/2

49.1967

5 1/4

10

K

49.7952

5 1/2

-

K 1/2

50.3937

5 3/4

11

L

50.9922

6

-

L 1/2

51.5907

6 1/4

12

M

52.1892

6 1/2

13

M 1/2

52.7877

6 3/4

-

N

53.466

7

14

N 1/2

54.1044

7

15

O

54.7428

7 1/4

-

O 1/2

55.3812

7 1/2

16

P

56.0196

7 3/4

-

P 1/2

56.658

8

17

Q

57.2964

8 1/4

18

Q 1/2

57.9348

8 1/2

-

R

58.5732

8 3/4

19

R 1/2

59.2116

9

20

S

59.85

9 1/4

-

S 1/2

60.4884

9 1/2

21

T

61.1268

9 3/4

22

T 1/2

61.7652

10

-

U

62.4026

10 1/4

23

U 1/2

63.042

10 1/2

24

V

63.6804

10 3/4

-

V 1/2

64.3188

11

25

W

64.8774

11 1/4

-

W 1/2

65.4759

11 1/2

26

X

66.0744

11 3/4

-

X 1/2

66.6729

12

-

Y

67.2714

12 1/4

-

Y 1/2

67.8699

12 1/2

-

Z

68.4684