Yarn Weight Comparison Chart
AUS |
UK |
USA |
Other Terms |
Suggested Needle Size |
2 ply |
2 ply |
Lace Weight |
Super Fine, Ultra Fine, Baby |
1.5 – 2.25mm |
3 ply |
3 ply |
Light Fingering |
2.25 – 3mm | |
4 ply |
4 ply |
Fingering |
Fine, Baby, Sock |
2.25 – 3.25mm |
5 ply |
Light Weight |
Sport |
Light DK |
3.25 – 3.75mm |
8 ply |
Double Knit (DK) |
Light Worsted |
|
3.75 – 4.5mm |
10-12 ply |
Aran |
Worsted |
|
4.5 – 5.5mm |
13-14 ply |
Chunky |
Bulky |
|
5.5 – 8mm |
>14 ply |
Super Chunky |
Super Bulky |
|
8mm & up |
Crochet Hooks
Crochet hooks are made of steel, plastic and alloy metals. Each hook is used with a set size of thread unless otherwise stated in the pattern. A pattern should specify a hook size and a tension, so a larger or smaller hook may be required to achieve that tension. If the crocheting is too loose, use a smaller hook, if the crocheting is too tight, use a larger hook. The table below is to be used as a guide only for thread and hook size.
Thread Size | Hook Size |
100 | 0.60mm |
80 | 0.60mm |
60 | 0.75mm |
40 | 1.00mm |
20 | 1.25mm |
10 | 1.50mm - 1.75mm |
3ply | 2.00mm - 2.50mm |
4ply | 2.50mm - 3.00mm |
8ply | 3.50mm - 4.00mm |
American Thread / Yarns
American threads usually use the same sizing as our own for crochet cotton sizes such as our number 10, 20, 40, etc. shown as No 10 or #10 etc. Bedspread weight yarn generally refers to our No 10 crochet cotton but some patterns may use thicker yarn such as No 5 or even our 4 ply cotton, so check hook and tension specified.
Yarn sizes however are generally provided as a weight of yarn such as worsted weight, sports weight, etc. The following provides a very basic guide for determining the yarn to use and should be used in conjunction with any specified hook size and tension.
American Yarn |
Sock / Baby / |
Sport / Baby |
Light Worsted / DK |
Worsted Weight |
Bulky / Chunky |
Crochet Tension stitches / 10cm |
21 - 28 |
16 - 20 |
16 - 18 |
12 - 16 |
8 - 12 |
Knit Tension stitches / 10cm |
26 -32 |
22 - 28 |
20 - 24 |
18 - 20 |
12 - 18 |
Crochet Hook Size |
2.00 - 3.50mm |
3.50 - 4.00mm |
4.00 - 4.50mm |
5.00 - 6.00mm |
6.50mm → |
Knitting Needle Size |
2.00 - 3.25mm |
3.50 - 4.00mm |
3.75 - 4.50mm |
5.00 - 5.50mm |
5.50 - 8.00mm |
Australian Yarn |
3ply - 4ply |
5ply - baby 8ply |
8ply - Aran |
10ply - 12ply |
12ply - 16ply + furs, etc |
When using an American pattern that requires worsted weight yarn and you want to use 8ply yarn and a 4.00mm hook, remember the article will probably turn out smaller, so from the tension, add more stitches / rows to achieve the required size.
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