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Needle and Hook Conversion Chart

Actual size (mm.)US needle sizeEquivalent US hook sizeEquivalent UK size
2 mm.0-14
2.25 mm.1B13
2.5 mm.1.5-12
2.75 mm.2C12
3 mm.2.5-11
3.25 mm.3D10
3.5 mm.4E9
3.75 mm.5F9
4 mm.6G8
4.5 mm.7-7
5 mm.8H6
5.5 mm.9I5
6 mm.10J4
6.5 mm.10.5K3
7 mm.10.75-2
8 mm.11L0
9 mm.13M0
10 mm.15N0
12 mm.17--
15 mm.19--
20 mm.35--
50 mm.50--