Metric
|
US
|
UK (old)
|
2.00mm
|
0
|
14
|
2.25mm
|
1
|
13
|
2.75mm
|
2
|
12
|
3.00mm
|
–
|
11
|
3.25mm
|
3
|
10
|
3.50mm
|
4
|
–
|
3.75mm
|
5
|
9
|
4.00mm
|
6
|
8
|
4.50mm
|
7
|
7
|
5.00mm
|
8
|
6
|
5.50mm
|
9
|
5
|
6.00mm
|
10
|
4
|
6.50mm
|
10 ½
|
3
|
7.00mm
|
–
|
2
|
7.50mm
|
–
|
1
|
8.00mm
|
11
|
0
|
9.00mm
|
13
|
00
|
10.00mm
|
15
|
000
|
12.00mm
|
17
|
–
|
15.00mm
|
19
|
–
|
20.00mm
|
35
|
–
|
|
|
|