The conversions below are for guidance only as there is no direct comparisons between the sizes. Important : Many pre-standardisation knitting patterns refer to obsolete needle sizes. To overcome this, use an equivalent yarn and experiment with needles to create the stated tension in the pattern - use the pair that best reproduces that tension.
Metric
Needle Sizes
British
Needle Sizes
American
Needle Sizes
1.75 mm
15
000
2.00 mm
14
0 or 00
2.25 mm
13
0 or 1
2.75 mm
12
1 or 2
3.00 mm
11
2
3.25 mm
10
3
3.50 mm/3.75 mm
9
4 or 5
4.00 mm
8
5
4.50 mm
7
6 or 7
5.00 mm
6
7 or 8
5.50 mm
5
8 or 9
6.00 mm
4
9 or 10
6.50 mm
3
10 or 10.50
7.00 mm
2
10.50
7.50 mm
1
11
8.00 mm
0
11
8.50 mm/9.00 mm
00
13
10.00 mm
000
15
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