crochet hooks

Five-inch long steel crochet hooks are sized from number 00, the largest, to number 15, the smallest, which is made for use with #250 thread. Steel hooks are usually used with cotton.

Bone hooks are 4½ or 5 inches long and made in sizes 1 through 6.

In all other hooks, “1” or “A” is the smallest size, and manufacturers use a variety of systems. Letter sizes run from A (thinnest) to S, the thickest. The numbered sizes run to 16. Plastic and aluminum hooks are sized in various ways. Wooden hooks are 9" or 10" long, and come in sizes from 7 through 16.

Afghan hooks are distinguished by a lack of a flat finger grip.

Crochet Hook Sizes
Steel	Crochet hook	Bamboo	Plastic		Millimeters
					1.25
					1.5
00					2
0	4
1	B-1, 3				2.25
				C	2.5
2	C-2, 2				2.75
				D	3
3	D-3, 1		D-3		3.25
4	, 0	E-4	E-4	E	3.5
5	F-5, 00		F-5		3.75
6	, F	F-5	G-6	F	4
7	G, 7	G-6		G	4.5
8		H-8	H-8	H	5
9		I-9	I-9	I	5.5
10		J-10	J-10	J	6
10½		K-10½	K-10½	K	6.5
					7
	K				7.5
11			L-11		8
13/14	M/N-13		N-13		9
15	N/P-15		P-15		10
16
17					12.75
18
19	P/Q				15
			Q-19		15.75
				P	16
35	S		S-35		19
50					25