Knitting Needle (& Crochet Hook) Sizing Chart

Here’s a basic knitting needle sizing chart. There are many different systems for measuring the diameter of knitting needles. The most common ones which I have come across are listed in the table below:

  • Metric (millimeters)
  • European/Canadian Sizing (24 is a very small needle and the numbers count down as they get larger)
  • USA Sizing (where size 0000 is a very small needle and they get larger as you count up)
  • Japanese Sizing (which seems to be similar to the USA Sizing in that they count up from 0, but the numbers are different)
  • Crochet hooks (in both their letter and number sizes).
  • Yarn Weights (included as reference for the different sizes)
knitting needle size chart
 Knitting NeedlesCrochet HooksYarn
Metric (AUS / NZ)(UK & CAD)(USA)(Japan)LetterNumberNameNumber
0.50mm240x8---Lace/
Fingering
0.75mm220x6---
0.875mm20----
1.0mm190x5---
1.125mm-----
1.25mm180x4---
1.50 mm170x3---
1.625mm16----
1.75 mm150x2---
2.00mm1400--
2.25mm131-B1
2.50mm13-1--Sock/
Fingering
2.75mm1222C2
3.00mm11-3--
3.125mm-3---
3.25mm1134D3
3.50mm1045E4Sport/
Baby
3.75mm95-F5
4.00mm866G6DK/Light
4.25mm-67G-
4.50mm778-7
4.75mm--9--Worsted/
Afghan/
Aran
5.00mm6810H8
5.25mm-9-I-
5.50mm5911I9
5.75mm-1012J-Bulky/
Chunky Weight
6.00mm41013-14J10
6.50mm310.515K10.5
7.00mm2----
7.50mm1----
8.00mm011-L11
8.50mm-----Super Bulky
9.00mm0x213-M-N13
9.50mm---
10.00mm0x315-N-P15
10.50mm-----
11.00mm-----
11.50mm-16-P16
12.00mm-----
12.50mm-17---
13.00mm-----Jumbo
14.00mm-----
15.00mm-19-P-Q19
16.00mm---Q-
17.00mm-----
18.00mm-----
19.00mm-35-S
20.00mm-36---
21.00mm-----
22.00mm-----
23.00mm-----
24.00mm-----
25.00mm-50-T-U-X-
35.00mm-70-T-X-

You never know when you are going to need to figure out how to convert needles and hooks of different sizes! Print a copy of this chart using the free pdf chart in the link below and then you can post it on your fridge or pop a copy into your knitting bag :).

Can you think of any referance charts or materials you would like to see?

If so email me and let me know what I am missing and I will try to add it the next time I have some time to spare! 🙂

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