• Home
  • Needle Size & Yarn Weight Information

Needle Size & Yarn Weight Information

Needle Size Conversion Chart
Millimeter range
US Knitting needle size
UK Knitting needle size
US Crochet hook size (letter)
US Crochet hook size
UK Crochet hook size
.4 mm
 
 
 
16
 
.5 mm
 
 
 
15
 
.6 mm
 
 
 
14
6
.75 mm
 
 
 
13
 
.70 mm
 
 
 
12
5
.8 mm
 
 
 
11
 
1 mm
 
 
 
10
4
1.15 mm
 
 
 
9
 
1.25 mm
 
 
 
8
3
1.50 mm
 
 
 
7
2.5
1.6 mm
 
 
 
6
 
1.7 mm
 
 
 
5
 
1.75 mm
 
 
 
4
2
1.85 mm
 
 
 
3
 
1.95 mm
 
 
 
2
 
2.00 mm
0
14
 
1
1
2.25 mm
1
13
B
0
0
2.5 mm
 
12
 
 
 
2.75 mm
2
12
C
2
 
3.00 mm
 
11
 
 
 
3.25 mm
3
10
D
3
 
3.5 mm
4
 
E
4
 
3.75 mm
5
9
F
5
 
4.00 mm
6
8
G
6
 
4.25 mm
 
 
 
 
 
4.5 mm
7
7
 
7
 
5.00 mm
8
6
H
8
 
5.5 mm
9
5
I
9
 
6.00 mm
10
4
J
10
 
6.5 mm
10.5
3
K
10.5
 
7.00 mm
 
2
 
 
 
7.5 mm
 
1
 
 
 
8.00 mm
11
0
L
11
 
9.00 mm
13
 
M/N
13
 
10.00 mm
15
 
N/P
15
 
12.00 mm
 
 
 
 
 
12.75 mm
17
 
 
 
 
15 mm
19
 
P/Q
 
 
16 mm
 
 
Q
 
 
19 mm
35
 
S
 
 
20 mm
36
 
 
 
 
25 mm
50
 
 
 
 
* Please note that conversions are approximate
Yarn Weight Conversion Chart
UK
USA
Craft Council of America Category
Australia
1 ply
Laceweight
0
2 ply
2 ply
Fingering
1
3 ply
3 ply
Sock
1
3 ply
4 ply
Sport
2
5 ply
DK
DK/Light Worsted
3
8 ply
Aran
Worsted
4
10 ply
Chunky
Bulky
5
12 ply
Super Chunky
Super Bulky
6
14 ply
* Please note that conversions are approximate