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Needle & Yarn guides
This page has been provided to help with conversions between needle sizes and yarn weights. The needle sizes provided in knitting patterns should be considered a starting point, rather than a fixed rule, as the gauge is the important factor. Likewise, when substituting yarns, consider gauge and fibre content.
 

Metric

2.25mm

2.5mm

2.75mm

3mm

3.25mm

3.5mm

3.75mm

4mm

4.5mm

UK size

13

-

12

11

10

-

9

8

7

US size

1

1 ½

2

2 ½

3

4

5

6

7

 

Metric

5mm

5.5mm

6mm

6.5mm

7mm

7.5mm

8mm

9mm

10mm

UK size

6

5

4

3

2

1

0

00

000

US size

8

9

10

10 ½

-

-

11

13

15

 

 

UK

4ply

Light DK

DK

Aran

Chunky

Bulky

US

Sock, Fingering

Sport

Light Worsted

Worsted

Heavy Worsted

Bulky

Ply

3 or 4

5

8

10

12

14

WPI

14

12

11

 8 - 9

7

6

sts per 10cm/4in

27 - 32

23 - 26

21 - 24

18 - 20

16 - 18

12 -15

needle
size (mm)

2.25 - 3

3.25 - 3.75

3.5 - 4

4 -5

5 - 7

8+