US, Canada |
UK, Australia, Ireland, New Zealand |
Japan, India, China, South Africa |
Spain, Italy, Netherlands, Switzerland |
Inside Diameter & Circumference(mm) |
4 |
H |
7 |
6.75 |
14.88 & 46.8 |
4.25 |
H.5 |
7.5 |
15.09 & 47.4 |
|
4.5 |
I |
8 |
8 |
15.29 & 48 |
4.75 |
J |
8.75 |
15.49 & 48.7 |
|
5 |
J 1/2 |
9 |
9.25 |
15.7 & 49.3 |
5.25 |
K |
10 |
15.9 & 50 |
|
5.5 |
K 1/2 |
10 |
10.5 |
16.1 & 50.6 |
5.75 |
L |
11.25 |
16.31 & 51.2 |
|
6 |
L 1/2 |
11 |
11.75 |
16.51 & 51.9 |
6.25 |
M |
12 |
12.5 |
16.71 & 52.5 |
6.5 |
M 1/2 |
13 |
13.25 |
16.92 & 53.1 |
6.75 |
N |
13.75 |
17.12 & 53.8 |
|
7 |
N 1/2 |
14 |
14.5 |
17.32 & 54.4 |
7.25 |
O |
15 |
17.53 & 55.1 |
|
7.5 |
O 1/2 |
15 |
15.75 |
17.73 & 55.7 |
7.75 |
P |
16.25 |
17.93 & 56.3 |
|
8 |
P 1/2 |
16 |
17 |
18.14 & 57 |
8.25 |
Q |
17.5 |
18.34 & 57.6 |
|
8.5 |
Q 1/2 |
17 |
18.25 |
18.54 & 58.3 |
8.75 |
R |
19 |
18.75 & 58.9 |
|
9 |
R 1/2 |
18 |
19.5 |
18.95 & 59.5 |
9.25 |
S |
20.25 |
19.15 & 60.2 |
|
9.5 |
S 1/2 |
19 |
20.75 |
19.35 & 60.8 |
9.75 |
T |
21.5 |
19.56 & 61.4 |
|
10 |
T 1/2 |
20 |
22 |
19.76 & 62.1 |
10.25 |
U |
21 |
22.75 |
19.96 & 62.7 |
10.5 |
U 1/2 |
22 |
23.25 |
20.17 & 63.4 |
10.75 |
V |
24 |
20.37 & 64 |
|
11 |
V 1/2 |
23 |
24.75 |
20.57 & 64.6 |
11.25 |
W |
25.25 |
20.78 & 65.3 |
|
11.5 |
W 1/2 |
24 |
26 |
20.98 & 65.9 |
11.75 |
X |
26.5 |
21.18 & 66.6 |
|
12 |
X 1/2 |
25 |
27.25 |
21.39 & 67.2 |
12.25 |
Y |
27.75 |
21.59 & 67.8 |
|
12.5 |
Z |
26 |
28.5 |
21.79 & 68.5 |
12.75 |
Z 1/2 |
29 |
22 & 69.1 |
|
13 |
27 |
29.75 |
22.2 & 69.7 |
|
13.25 |
Z1 |
30.5 |
22.4 & 70.4 |
|
13.5 |
31 |
22.61 & 71 |
||
13.75 |
Z2 |
31.75 |
22.81 & 71.7 |
|
14 |
Z3 |
32.25 |
23.01 & 72.3 |
|
14.25 |
33 |
23.22 & 72.9 |
||
14.5 |
Z4 |
33.5 |
23.42 & 73.6 |
|
14.75 |
34.25 |
23.62 & 74.2 |
||
15 |
34.75 |
24.23 & 76.1 |
||
15.25 |
35.5 |
24.03 & 75.5 |
||
15.5 |
36.25 |
24.23 & 76.1 |
||
15.75 |
36.75 |
24.43 & 76.8 |
||
16 |
37.5 |
24.64 & 77.4 |