| CROCHET HOOK CONVERSION CHART | ||
| Metric/mm | UK/Canada | US |
| 2 | – | – |
| 2.25 | 14 | – |
| 2.5 | 13 | 1/B |
| 2.75 | 12 | – |
| 3 | 11 | 2/C |
| 3.25 | 11 | 3/D |
| 3.5 | 10 | 4/E |
| 3.75 | 9 | 5/F |
| 4 | – | – |
| 4.25 | 8 | 6/G |
| 4.5 | – | – |
| 4.75 | 7 | 7 |
| 5 | 6 | 8/H |
| 5.5 | 5 | 8/I |
| 6 | 4 | 10/J |
| 6.5 | 3 | 10 ½ /K |
| 7 | 2 | – |
| 8 | 0 | 11/L |
| 9 | 00 | 13/M |
| 9.5 | – | – |
| 10 | 000 | 15/N |
| 11.5 | – | P |
| 12 | – | 17 |
| 15.75 | – | Q |
| Steel hooks | ||
| .6 | 6 | 14 |
| .7 | – | 13 |
| .75 | 5 | 12 |
| .8 | – | 11 |
| 1 | 4 | 10 |
| 1.15 | – | 9 |
| 1.25 | 3 | 8 |
| 1.5 | 2.5 | 7 |
| 1.6 | – | 6 |
| 1.7 | – | 5 |
| 1.75 | 2 | 4 |
| 1.89 | – | 3 |
| 1.95 | – | 2 |
| 2 | 1 | 1 |
| 2.5 | 00 | 0 |
| 3 | – | 00 |
| YARN WEIGHT CONVERSION CHART | ||
| US | UK | AU |
| Laceweight | 2 ply | 2ply |
| Light Fingering | 3ply | 3ply |
| Fingering | 4ply | 4ply |
| Sport | Light DK | 5ply |
| DK/Light Worsted | – | – |
| Worsted | – | 8ply |
| Aran | Aran | – |
| Bulky | Chunky | 12ply |
| Super Bulky | Super Chunky | |