So you have come across a knitting pattern quoting ‘strange’ knitting needle sizes and need to convert them to something you understand! Hopefully this Metric, US / UK conversion chart will help.

Happy Knitting!

Metric (mm)
 UK
 US
2.0 mm
 14 0
2.25 mm
 13 1
2.5 mm
 12 1
2.75 mm
 12 2
3 mm
 11 3
3.25 mm
 10 3
3.5 mm
 9 4
3.75 mm
 9 5
4 mm
 8 6
4.25 mm
 7 6
4.5 mm
 6 7
5 mm
 5 8
5.5 mm
 4 9
6 mm
 3 10
6.5 mm
 2 10 1/2
7 mm
 1 10 1/2
8 mm
 0 11
9 mm
 00 13
10 mm
 000 15
12 mm
 – 17
15 mm
 – 19
19 mm
 – 35
20 mm
 – 36
25 mm
 – 50