A handy table of knitting needle sizes!
US Sizes
00000
0000
000
00
0
1
1.5
2
2.5
3
4
5
6
7
8
9
10
10.5
10.75
10.875
11
13
15
17
19
35
50
Metric Sizes
1.0 mm
1.25 mm
1.50 mm
1.75 mm
2.0 mm
2.25 mm
2.50 mm
2.75 mm
3.00 mm
3.25 mm
3.50 mm
3.75 mm
4.00 mm
4.50 mm
5.00 mm
5.50 mm
6.00 mm
6.50 mm
7.00 mm
7.50 mm
8.00 mm
9.00 mm
10.00 mm
12-12.75 mm
15-16 mm
19 mm
25 mm
UK Sizes
19
18
17
15
14
13
-
12
11
10
-
9
8
7
6
5
4
3
2
1
0
00
000
-
-
-
-