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 |
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