|
Circumference (mm)
|
Diameter (mm)
|
Europe
|
UK & Australia
|
US & Canada
|
China
|
Switzerland
|
|
44.2
|
14.1
|
44
|
F½
|
3
|
6
|
4
|
|
44.8
|
14.3
|
45
|
G
|
|
|
5¼
|
|
45.5
|
14.5
|
|
G½
|
3½
|
7
|
|
|
46.1
|
14.7
|
46
|
H
|
|
|
6½
|
|
46.8
|
14.9
|
47
|
H½
|
4
|
8
|
|
|
47.4
|
15.1
|
|
I
|
|
9
|
7¾
|
|
48.0
|
15.3
|
48
|
I½
|
4½<
|
|
|
|
48.7
|
15.5
|
|
J
|
|
|
9
|
|
49.3
|
15.7
|
49
|
J½
|
5
|
10
|
|
|
50.0
|
15.9
|
50
|
K
|
|
|
10
|
|
50.6
|
16.1
|
|
K½
|
5½
|
11
|
|
|
51.2
|
16.3
|
51
|
L
|
|
|
11¾
|
|
51.9
|
16.5
|
52
|
L½
|
6
|
12
|
12¾
|
|
52.5
|
16.7
|
|
M
|
|
13
|
|
|
53.1
|
16.9
|
53
|
M½
|
6½
|
|
14
|
|
53.8
|
17.1
|
|
N
|
|
14
|
|
|
54.4
|
17.3
|
54
|
N½
|
7
|
|
15¼
|
|
55.1
|
17.5
|
55
|
O
|
|
15
|
|
|
55.7
|
17.7
|
|
O½
|
7½
|
|
16½
|
|
56.3
|
17.9
|
56
|
P
|
|
16
|
|
|
57.0
|
18.1
|
57
|
P½
|
8
|
17
|
17¾
|
|
57.2
|
18.2
|
|
|
|
|
|
|
57.6
|
18.3
|
|
Q
|
|
|
|
|
58.3
|
18.5
|
58
|
Q½
|
8½
|
18
|
|
|
58.9
|
18.8
|
59
|
R
|
|
|
19
|
|
59.5
|
19.0
|
|
R½
|
9
|
19
|
|
|
60.2
|
19.2
|
60
|
S
|
|
20
|
20¼
|
|
60.8
|
19.4
|
61
|
S½
|
9½
|
|
|
|
61.4
|
19.6
|
|
T
|
|
21
|
21½
|
|
62.1
|
19.8
|
62
|
T½
|
10
|
|
|
|
62.7
|
20.0
|
|
U
|
|
22
|
|
|
63.4
|
20.2
|
63
|
U½
|
10½
|
|
22¾
|
|
64.0
|
20.4
|
64
|
V
|
|
23
|
|
|
64.6
|
20.6
|
|
V½
|
11
|
|
|
|
65.3
|
20.8
|
65
|
W
|
|
24
|
25
|
|
65.9
|
21.0
|
66
|
W½
|
11½
|
25
|
|
|
66.6
|
21.2
|
|
X
|
|
|
|
|
67.2
|
21.4
|
67
|
X½
|
12
|
26
|
27½
|
|
67.8
|
21.6
|
|
Y
|
|
|
|
|
68.5
|
21.8
|
68
|
Z
|
12½
|
|
28¾
|
|
69.1
|
22.0
|
69
|
Z
|
|
|
|
|
69.7
|
22.2
|
70
|
|
13
|
|
|
|
70.4
|
22.4
|
|
Z+1
|
|
|
|
|
71.0
|
22.6
|
|
Z+2
|
13½
|
|
|
|
