Standard Yarn Weight System

Type of
Yarns in
Category

Fingering
10-count
crochet
thread

Sock,
Fingering,
Baby

Sport,
Baby

DK,
Light
Worsted

Worsted,
Afghan,
Aran

Chunky,
Craft,
Rug

Super
Bulky,
Roving

Jumbo,
Roving

Knit Gauge
Range* in
Stockinette
Stitch to 4 inches

33–40**
sts

27–32
sts

23–26
sts

21–24
sts

12–15
sts

7–11
sts

6 sts and
fewer

Recommended
Needle in
Metric Size
Range

1.5–2.25
mm

2.25—
3.25
mm

3.25—
3.75
mm

3.75—
4.5
mm

4.5—
5.5
mm

5.5—
8
mm

8—
12.75
mm

12.75 mm
and larger

Recommended
Needle U.S.
Size Range

000–1

1 to 3

3 to 5

5 to 7

7 to 9

9 to 11

11
to 17

17
and
larger

Crochet Gauge*
Ranges in
Single Crochet
to 4 inch

32–42
double
crochets**

21–32
sts

16–20
sts

12–17
sts

11–14
sts

8–11
sts

7–9
sts

6 sts and
fewer

Recommended
Hook in Metric
Size Range

Steel***
1.6–1.4
mm
Regular
hook
2.25 mm

2.25—
3.5
mm

3.5—
4.5
mm

4.5—
5.5
mm

5.5—
6.5
mm

6.5—
9
mm

9—
15
mm

15
mm and
larger

Recommended
Hook U.S.
Size Range

Steel***
6, 7, 8
Regular
hook B–1

B–1
to
E–4

E–4
to
7

7
to
I–9

I–9
to
K–10 1⁄2

K–10 1⁄2 to
M–13

M–13
to Q

Q
and
larger