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Needle and hook sizes

Depending on where you got your pattern from, you might find that the needle or hook size aren’t what you might expect. There are actually three different types of sizes, and the chart below will help you convert between them.

Needle sizes

Metric (mm)

UK

USA

2140
2.25131
2.5-1.5
2.75122
311-
3.25103
3.5-4
3.7595
48-
4.25-6
4.577
568
5.559
6410
6.5310.5
72-
7.51-
8011
90013
1000015
12-17

Hook sizes

Metric (mm)

UK

USA

214B/1
2.2513-
2.512C/2
311-
3.2510D/3
3.59E/4
48G/6
4.577
56H/8
5.55I/9
64J/10
6.53K/10.5
72-
80-
900-
10000-