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Yarn Classifications
Crochet Hook Conversions
Stitches
 
 
 

 

 

 

 

 

Yarn classifications

  #0 Lace #1 Superfine #2 Fine #3 Light #4 Medium #5 Bulky #6 Super Bulky
Type of yarn
in category
Fingering
10-count
thread crochet
Sock
Fingering
Baby
Sport
Baby
DK
Light
Worsted
Worsted
Afghan
Aran
Chunky
Craft
Rug
Bulky
Roving
Crochet gauge
# sc/4"
~42 -> ~32 ~32 -> ~21 ~20 -> ~18 ~17 -> ~12 ~14 -> ~11 ~11 -> ~8 ~9 -> ~5
Hook Size 1.4mm -> 1.6mm 2.25 -> 3.5 2.25 -> 3.5 4.5 -> 5.5 5.5 -> 6.5 6.5 -> 9 9+

 

 

 

 

Crochet hook conversion table

Metric USA UK
1.00 mm 10 steel 4 steel
1.25 mm 8 steel 3 steel
1.30 mm -- --
1.40 mm -- --
1.50 mm 7 steel 2.5 steel
1.65 mm -- --
1.75 mm 4 steel 2 steel
2.00 mm -- 14
2.25 mm 1/B 13
2.50 mm -- 12
2.75 mm C/2 --
3.00 mm -- 11
3.25 mm D/3 10
3.50 mm E/4 9
3.75 mm F/5 --
4.00 mm G/6 8
4.50 mm 7 7
5.00 mm H/8 6
5.50 mm I/9 5
6.00 mm J/10 4
6.50 mm K/10.5 3
7.00 mm -- 2
8.00 mm L/11 0
9.00 mm M/13 00
10.00 mm N/15 000