Hook Size Information

[Amy]

Yarn Hook Sizes

 

US Size Range*........Millimeter Range

B-1........................2.25 mm

C-2........................2.75 mm

D-3........................3.25 mm

E-4........................3.5 mm

F-5........................3.75 mm

G-6........................4 mm

7...........................4.5 mm

H-8........................5 mm

I-9.........................5.5 mm

J-10.......................6 mm

K-10.5....................6.5 mm

L-11.......................8 mm

M/N-13...................9 mm

N/P-15...................10 mm

P/Q........................15 mm

Q...........................16 mm

S...........................19 mm

 

*Letter or number may vary by manufacturer. Please rely on mm sizing for best accuracy.

 

Steel Hook Sizes

 

Steel crochet hooks are used most often with crochet threads and lace/fingering weight yarns. Steel hooks use a different sizing system: the higher the hook number, the smaller the hook (reverse of system for yarn hook sizing).

 

00 (3.5 mm)

0 (3.25 mm)

1 (2.75 mm)

2 (2.25 mm)

3 (2.1 mm)

4 (2.0 mm)

5 (1.9 mm)

6 (1.8 mm)

7 (1.65 mm)

8 (1.5 mm)

9 (1.4 mm)

10 (1.3 mm)

11 (1.1 mm)

12 (1.0 mm)

13 (0.85 mm)

14 (0.75 mm)