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Sizing Guide

Conversion chats to help you:
Knitting needles
Crochet hook


Knitting needle sizing
Knitting needles come in Amercan, British, Japanese and Metric sizing. Although all 3 systems have their equivalents in almost all sizes, there is a minute difference. For example, a Size 8 British needle is equivalent to the 4mm metric needle, but Size 8 British needle is actually 4.2mm. In practice, 0.2mm has a very slight effect on tension only. The easiest thing to do is to use a needle gauge to work which needle to use! Generally, most knitting books will use the American or British system along side with the metric system.

Metric - British - American
Metric (mm)
2.00 2.25 2.50 3.00 3.25 3.50 3.75 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 10.00 12.00 15.00
British 14
13
12
11
10
9

8
7
6
5
4
3
2
1
0
00
000



American
00
0
1.5
2.5
3
4
5
6
7
8
9
10
10.5 10.75

11

13
15
17
19

Metric - Japanese / Chinese
Metric (mm)
2.10 2.40 2.70 3.00 3.30 3.60 3.90 4.20 4.50 4.80 5.10 5.40 5.70 6.00 6.30 6.60
Japanese Size
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


Crochet hook sizing
Crochet hooks too come in various sizing systems. These tend to be less standardised than knitting needles.

Metric - British - American
Metric (mm)
2.00 2.25 2.30 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.50 5.00 5.50 6.00 6.50 7.00 8.00 9.00 10.00
Japanese 2/0 - 3/0 4/0 - 5/0 6/0 7/0 7.5/0 8/0 9/0 10/0 - 7.00 8.00 9.00 10.00
British 14 13 - 12 - 11 10 9 - 8 7 6 5 4 3 2 0 00 000
American
- B/1 - - C/2 - D/3 E/4 F/5 G/6 7 H/8 I/9 J/10 K/10.5 - L/11 M/13 N/15



Knit. Create. Enjoy.
(C) Tropical Knitter Pte Ltd 2012