Knitting Needle Sizes

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US, Metric and Old UK Sizes

Needle conversions are to the nearest .25mm

For instance, US size 6 needles are actually 4.25mm but since there is no metric needle size 4.25mm the closest size, 4mm, is the best equivalent. Since you should always check your gauge before commencing your garment this shouldn't cause any problems.


US Metric Old UK
000 1.5mm
00 1.75mm
0 2mm 14
1 2.25mm 13
2.5mm
2 2.75mm 12
3mm 11
3 3.25mm 10
4 3.5mm
5 3.75mm 9
6 4mm 8
7 4.5mm 7
8 5mm 6
9 5.5mm 5
10 6mm 4
10 ½ 6.5mm 3
7mm 2
7.5mm 1
11 8mm 0
13 9mm 00
15 10mm 000

Japanese Needle Sizes

0 = 2.1mm

1 = 2.4mm

2 =2.7mm

3 = 3.0mm

4 = 3.3mm

5 =3.6mm

6 = 3.9mm

7 = 4.2mm

8 = 4.5mm

9 = 4.8mm

10 = 5.1mm

11 = 5.4mm

12 = 5.7mm

13 = 6.0mm

14 = 6.3mm

15 = 6.6mm

Other Articles of Interest

Chart of international crochet hook sizes

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