Diameter mm
Diameter inch
Order Size
USA &Canada
Germany
Swiss
France
UK
Japan
9.91
.390
000
-
-
-
-
-
10.72
.422
00
-
-
-
-
-
11.53
.454
0
-
-
-
-
-
-
-
1/2
-
-
-
A
-
12.37
.487
1
-
-
-
B
-
12.78
.503
1 1/2
-
-
-
C
-
13.21
.520
2
13 1/4
1 1/2
41 1/2
D
2
13.61
.536
2 1/2
13 3/4
2 3/4
42 3/4
E
3
14.05
.553
3
14
4
44
F
4
-
-
-
-
5 1/4
45 1/4
G
5
14.45
.569
3 1/2
14 1/2
-
-
-
-
-
-
3 3/4
-
6 1/2
46 1/2
H
6 1/2
14.86
.585
4
15
-
-
H 1/2
7
-
-
4 1/4
-
7 3/4
47 3/4
I
-
15.27
.601
4 1/2
15 1/4
-
-
I 1/2
8
-
-
-
-
9
49
J
-
15.70
.618
5
15 3/4
-
-
J 1/2
9
-
-
-
-
10
50
K
-
16.10
.634
5 1/2
16
11 3/4
51 3/4
L
-
-
-
-
-
-
-
L 1/2
11
16.51
.650
6
16 1/2
12 3/4
52 3/4
M
12
16.92
.666
6 1/2
17
14
54
N
13
17.35
.683
7
17 1/4
15 1/4
55 1/4
O
14
17.75
.699
7 1/2
17 3/4
16 1/2
56 1/4
P
15
18.19
.716
8
18
17 3/4
57 3/4
Q
16
18.59
.732
8 1/2
18 1/2
-
-
-
17
-
-
-
-
19
59
R
-
18.99
.748
9
19
-
-
-
18
-
-
-
-
20 1/4
60 1/4
S
-
19.41
.764
9 1/4
19 1/2
-
-
-
19
-
-
-
-
21 1/2
61 1/2
T
-
19.84
.781
10
20
-
-
T 1/2
20
-
-
10 1/4
-
22 3/4
62 3/4
U
21
20.24
.797
10 1/2
20 1/4
-
-
U 1/2
22
-
-
-
-
23 3/4
63 3/4
V
-
20.68
.814
11
20 3/4
-
-
V 1/2
23
-
-
-
-
25
65
W
-
21.08
.830
11 1/2
21
-
-
-
24
-
-
-
-
26 1/4
66 1/4
X
-
21.49
.846
12
21 1/4
27 1/2
67 1/2
rY
25
21.89
.862
12 1/2
21 3/4
28 3/4
68 3/4
Z
26
22.33
.879
13
22
-
-
-
27


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