ITALIAN SIZE |
UK SIZE |
FRENCH SIZE |
US SIZE |
INSIDE C. mm. |
DIAMETER mm. |
9 |
J |
49 |
|
4.90 |
1.56 |
9.5 |
J-1/2 |
49.25 |
5 |
4.96 |
1.58 |
10 |
K |
50 |
|
5.02 |
1.60 |
10.50 |
L |
50.50 |
5.5 |
5.06 |
1.61 |
11 |
L-1/2 |
51 |
|
5.09 |
1.62 |
11.50 |
M |
51.50 |
6 |
5.12 |
1.63 |
12 |
|
52 |
|
5.18 |
1.65 |
12.50 |
|
52.50 |
|
5.21 |
1.66 |
13 |
N |
53 |
6.5 |
5.28 |
1.68 |
13.50 |
|
53.50 |
|
5.34 |
1.70 |
14 |
|
54 |
|
5.40 |
1.72 |
14.50 |
O |
54.50 |
7 |
5.43 |
1.73 |
15 |
|
55 |
|
5.46 |
1.74 |
15.50 |
|
55.50 |
|
5.53 |
1.76 |
16 |
P |
56 |
7.5 |
5.59 |
1.78 |
16.50 |
P-1/2 |
56.50 |
|
5.65 |
1.80 |
17 |
Q |
57 |
8 |
5.68 |
1.81 |
17.50 |
|
57.50 |
|
5.75 |
1.83 |
18 |
|
58 |
|
5.81 |
1.85 |
18.50 |
|
58.50 |
8.5 |
5.84 |
1.86 |
19 |
R |
59 |
|
5.90 |
1.88 |
19.50 |
R-1/2 |
59.75 |
9 |
5.97 |
1.90 |
20 |
S |
60 |
|
6.03 |
1.92 |