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US versus European Stitches with Yarn Overs
 
Number of
Yarn Overs
US Term European Term
0 chain chain
0 slip stitch slip stitch
0 single crochet double crochet
1 half double crochet half treble crochet
1 double crochet treble crochet
2 treble double treble
3 double treble triple treble
4 triple treble quadruple treble
 
The following hook sizes are generic and are only a guide. Different manufacturers
may have different metric sizing for their hooks, metric sizing is the preferred
reference on patterns. Some patterns will not reference the metric size and therefore,
it is strongly recommended that you make a gauge swatch to confirm size and
proper measurements.

Steel Hook Sizing

 

Aluminum Hook Sizing

     
American Metric UK/Canada   American Metric UK/Canada
14 0.75 mm     B 2.00 mm 14
13 0.85 mm 7     2.25 mm 130
12 1.00 mm 6 1/2   C 2.50 mm 12
11 1.10 mm 6   D 3.00 mm 11
10 1.30 mm 5 1/2     3.25 mm 10
9 1.40 mm 5   E 3.50 mm 9
8 1.50 mm 4 1/2   F 3.75 mm  
7 1.65 mm 4     4.00 mm 8
6 1.80 mm 3 1/2   G 4.25 mm  
5 1.90 mm 3     4.50 mm 7
4 2.00 mm 2 1/2   H 5.00 mm 6
3 2.10 mm 2   I 5.50 mm 5
2 2.25 mm 1 1/2   J 6.00 mm 4
1 2.75 mm 1   K 6.50 mm 3
0 3.25 mm 0     7.00 mm 2
00 3.50 mm     L 8.00 mm 0
        M 9.00 mm 00
        N 10.00 mm 000
        P 11.50 mm  
        Q 16.00 mm  
        S 19.00 mm