Yarn Groups

Craft Yarn Council, which works for international yarn standards, has published the table below of the different yarn groups, from the very thin Lace to the somewhat more robust Jumbo

CategoriesKnitting stitches
per 10 cm
Knitting needle
Recommended in mm
Crochet stitches
per 10 cm
Crochet hook
Recommended in mm
0 – Lace33 – 401.5 – 2.2532 – 42Less than 2.25 mm
1 – Super Fine27 – 322.25 – 3.2521 – 322.25 – 3.5
2 – Fine23 – 263.25 – 3.7516 – 203.5 – 4.5
3 – Light21 – 243.75 – 4.512 – 174.5 – 5.5
4 – Medium16 – 204.5 – 5.511 – 145.5 – 6.5
5 – Bulky12 – 155.5 – 88 – 116.5 – 9
6 – Super Bulky7 – 118 – 12.757 – 99 – 15
7 – Jumbo6 and less12.75 and greater6 and less15 and greater