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Circumference
(mm) |
Diameter
(mm) |
HK |
US |
UK |
JP |
44.3 |
14.1 |
6 |
3 |
F |
4 |
44.5 |
14.3 |
7 |
3.25 |
F 1/2 |
5 |
46.5 |
14.7 |
8 |
3.27 |
G 1/2 |
6 |
47.7 |
14.9 |
9 |
4 |
H |
7 |
48.7 |
15.3 |
10 |
4.5 |
I 1/2 |
8 |
49.9 |
15.7 |
11 |
5 |
J 1/2 |
9 |
50.9 |
16.1 |
12 |
5.5 |
K 1/2 |
10 |
52.1 |
16.5 |
13 |
6 |
L 1/2 |
11 |
53.1 |
16.7 |
14 |
6.25 |
M |
12 |
54.3 |
17.1 |
15 |
6.75 |
N |
13.5 |
55.6 |
17.3 |
16 |
7 |
N 1/2 |
14 |
56.5 |
17.7 |
17 |
7.5 |
O 1/2 |
15 |
57.5 |
18.2 |
18 |
8 |
P 1/2 |
16.25 |
58.7 |
18.4 |
19 |
8.5 |
Q 1/2 |
17 |
59.7 |
18.8 |
20 |
9.25 |
R |
17.5 |
60.9 |
19.4 |
21 |
9.5 |
S |
18 |
61.9 |
19.4 |
22 |
9.75 |
S 1/2 |
19 |
63.1 |
19.8 |
23 |
10 |
T 1/2 |
20 |
64.1 |
20.2 |
24 |
10.5 |
U 1/2 |
22 |
65.3 |
20.6 |
25 |
11 |
V 1/2 |
23 |
66.3 |
21 |
26 |
11.5 |
W 1/2 |
24 |
67.5 |
21.2 |
27 |
12 |
X |
24.5 |
68.5 |
21.6 |
28 |
12.5 |
Y |
25 |
69.7 |
22 |
29 |
12.5 |
Z 1/2 |
26.5 |