Conversion table hook numbers

3 systems

There are 3 systems to number hook pens. In Europe (except the UK) we give them the diameter in mm. The US has some letter system. Here you see a useful translation table!

Conversion table

UK VS mm (EU)
14 0.06
12 0.75
11 1.00
8 1.50
6 1.75
14 B/1 2.00
12 C/2 2.50
10 D/3 3.00
9 E/4 3.50
8 F/5 4.00
7 G/6 4.50
6 H8 5.00
5 I/9 5.50
4 J/10 6.00
3 6.50

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