Needle and Hook Conversion Chart

Actual size (mm.)	US needle size	Equivalent US hook size	Equivalent UK size
2 mm.	0	-	14
2.25 mm.	1	B	13
2.5 mm.	1.5	-	12
2.75 mm.	2	C	12
3 mm.	2.5	-	11
3.25 mm.	3	D	10
3.5 mm.	4	E	9
3.75 mm.	5	F	9
4 mm.	6	G	8
4.5 mm.	7	-	7
5 mm.	8	H	6
5.5 mm.	9	I	5
6 mm.	10	J	4
6.5 mm.	10.5	K	3
7 mm.	10.75	-	2
8 mm.	11	L	0
9 mm.	13	M	0
10 mm.	15	N	0
12 mm.	17	-	-
15 mm.	19	-	-
20 mm.	35	-	-
50 mm.	50	-	-