Crochet Hook Conversion Charts

Aluminum/Plastic/Wood Hooks

B = 2.25mm
C = 2.75mm
D = 3.25mm
E = 3.5mm
F = 3.75mm
G = 4.0mm
H = 5.0mm
I = 5.5mm
J = 6.0mm
K = 6.5mm
L = 8.0mm
M = 9.0mm
N = 10.0mm

Steel Hooks

00 = 3.5mm
0 = 3.25mm
1 = 2.75mm
2 = 2.25mm
3 = 2.1mm
4 = 2.0mm
5 = 1.9mm
6 = 1.8mm
7 = 1.65mm
8 = 1.5mm
9 = 1.4mm
10 = 1.3mm
11 = 1.1mm
12 = 1.0mm
13 = .85mm
14 = .75mm