Patterns will list the recommended hook size for each project. If your hooks are like mine, some have letters only and others include the size in millimeters.
You can also use this size chart to “size up” or “size down” your hook if you find you need to adjust your gauge for sizing.
| Hook Size | Measurement |
|---|---|
| D | 3.125 mm |
| D-3 | 3.25 mm |
| E-4 | 3.50 mm |
| F-5 | 3.75 mm |
| G-6 | 4 mm |
| G | 4.25 mm |
| 7 | 4.50 mm |
| H-8 | 5 mm |
| I | 5.25 mm |
| I-9 | 5.50 mm |
| J | 5.75 mm |
| J-10 | 6 mm |
| K-10.5 | 6.5 mm |
| L-11 | 8 mm |
| M/N-13 | 9 mm |
| N/P-15 | 10 mm |
| P-16 | 11.5 mm |
| P/Q | 15 mm |
See the entire list of hook sizes and measurements on the Craft Yarn Council’s website.
