Crochet Hook Sizes

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This crochet hook sizes conversion chart compares metric (mm) measures to US terms.

Please note that this chart does not include steel hooks. They are sized differently. Steel hooks sizing are reversed compared to regular crochet hooks. With steel hooks, the higher the number, the smaller the hook.

Crochet Hook Sizes

Metric (mm)	US Term
2.25 mm	B-1
2.5 mm
2.75 mm	C-2
3.125 mm	D
3.25 mm	D-3
3.5 mm	E-4
3.75 mm	F-5
4 mm	G-6
4.25 mm	G
4.5 mm	7
5 mm	H-8
5.25 mm	I
5.5 mm	I-9
5.75 mm	J
6 mm	J-10
6.5 mm	K-10.5
7 mm
8 mm	L-11
9 mm	M/N-13
10 mm	N/P-15
11.5 mm	P-16
12 mm
15 mm	P/Q
15.75 mm	Q
16 mm	Q
19 mm	S
25 mm	T/U/X
30 mm	T/X

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About Devon

Devon is a work at home mom and owner/editor at Midwestern Moms and Midwestern Meals. In her spare time you can find her hanging out with her family, curled up with her Kindle Fire, or playing computer games with her hubby.

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