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Around the world, there are slight differences in terminology for hook sizes and yarn weights. So, if you're stuck on what hook size to use for a yarn or pattern, read on! LoveCrafts' handy conversion charts will help you choose the right crochet hook for your next project. Keep these charts close by to clear up any confusion! Print this page

Crochet hook size

Metric

US

2.25 mm

B-1

2.75 mm

C-2

3.25 mm

D-3

3.50 mm

E-4

3.75 mm

F-5

4.00 mm

G-6

4.50 mm

7

5.00 mm

H-8

5.50 mm

I-9

6.00 mm

J-10

6.50 mm

K-10.5

8.00 mm

L-11

9.00 mm

M-13

10.00 mm

N-15

12.00 mm

P-16

15.00 mm

P/Q

16.00 mm

Q

19.00 mm

S

20.00 mm

S

Steel crochet hook size

Metric

US

0.50 mm

18

0.60 mm

16

0.75 mm

14

0.85 mm

13

1.00 mm

12

1.10 mm

11

1.25 mm

10

1.50 mm

8

1.65 mm

7

1.75 mm

6

1.90 mm

5

2.00 mm

4

Yarn weights and required hook size

UK

US

AUS

Hook size

Lace

1 Ply

2 Ply

1.50-2.25 mm

Fingering

2 Ply

3 Ply

2.25-3.50 mm

Sport

4 Ply

5 Ply

3.50-4.50 mm

DK

DK

8 Ply

4.50-5.50 mm

Worsted

Aran

10 Ply

5.50-6.50 mm

Chunky

Bulky

12 Ply

6.50-9.00 mm

Super Chunky

Super Bulky

14 Ply

9.00 mm (and above)

Crochet terminology

British

US

Double Crochet

Single Crochet

Treble

Double Crochet

Half Treble

Half Double Crochet

Double Treble

Treble

Triple Treble

Double Treble

Miss

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