| U.S. Size |
Metric Range |
U.K. |
| 0 |
2 mm |
14 |
| 1 |
2.25 mm |
N/A |
| 1 |
2.5 mm |
13 |
| 2 |
2.75 mm |
12 |
| 2 |
3 mm |
11 |
| 3 |
3.25 mm |
10 |
| 4 |
3.5 mm |
N/A |
| 5
| 3.75 mm |
9 |
| 6 |
4 mm |
8 |
| N/A |
4.25 mm |
N/A |
| 7 |
4.5 mm |
7 |
| N/A |
4.75 mm |
N/A |
| 8 |
5 mm |
6 |
| N/A |
5.25 mm |
N/A |
| 9 |
5.5 mm |
5 |
| N/A |
5.75 mm |
N/A |
| 10 |
6 mm |
4 |
| 10 1/2 |
6.5 mm |
3 |
| |
7 mm |
2 |
| |
7.5 mm |
1 |
| 11 |
8 mm |
0 |
| 13 |
9 mm |
00 |
| 15 |
10 mm |
00 |
| 17 |
|
|
| 18 |
|
|
| 19 |
|
|
| 35 |
|
|
| 50 |
|
|
|
| METRIC SIZES(mm) |
US SIZES |
UK/CANADIAN |
| 2.0 |
- |
14 |
| 2.25 |
B/1 |
13 |
| 2.5 |
- |
12 |
| 2.75 |
C/2 |
- |
| 3.0 |
- |
11 |
| 3.25 |
D/3 |
10 |
| 3.5 |
E/4 |
9 |
| 3.75 |
F/5 |
- |
| 4.0 |
G/6 |
8 |
| 4.5 |
7 |
7 |
| 5.0 |
H/8 |
6 |
| 5.5 |
I/9 |
5 |
| 6.0 |
J/10 |
4 |
| 6.5 |
K/10 1/2 |
3 |
| 7.0 |
- |
2 |
| 8.0 |
L/11 |
0 |
| 9.0 |
M/13 |
00 |
| 10.0 |
N/15 |
000 |
Steel Hook Conversion Chart
| METRIC SIZES(mm) |
US SIZES |
UK SIZES |
| 0.75 |
14 |
|
| 0.85 |
13 |
7 |
| 1 |
12 |
6 1/2 |
| 1.1 |
11 |
6 |
| 1.3 |
10 |
5 1/2 |
| 1.4 |
9 |
5 |
| 1.5 |
8 |
4 1/2 |
| 1.65 |
7 |
4 |
| 1.8 |
6 |
3 1/2 |
| 1.9 |
5 |
3 |
| 2 |
4 |
2 1/2 |
| 2.1 |
3 |
2 |
| 2.25 |
2 |
1 1/2 |
| 2.75 |
1 |
1 |
| 3.25 |
0 |
0 |
| 3.5 |
00 |
|
|