Stitches
- Chain (ch)
- Single Crochet (sc)
- Half Double Crochet (hdc)
- Double Crochet (dc)
- Treble Crochet (tr)
- Slip Stitch (sl st)
- Single Crochet back loop only (sc blo)
- Herringbone Half Double Crochet (hhdc)
- Bobble (bo)
Techniques
- Slip knot
- Magic Ring
- Increases (sc inc)
- Decreases (sc dec)
- Joined rounds
- Continuous rounds
- Sl st to join
Hook Sizes
Crochet hooks come in a standard set of sizes, always measured in millimeters, and often assigned a corresponding size letter and number. Be careful not to confuse the mm size, and the hook size.
| 2.25 mm | B-1 |
| 2.5 mm | |
| 2.75 mm | C-2 |
| 3.125 mm | D |
| 3.25 mm | D-3 |
| 3.5 mm | E-4 |
| 3.75 mm | F-5 |
| 4 mm | G-6 |
| 4.25 mm | G |
| 4.5 mm | 7 |
| 5 mm | H-8 |
| 5.25 mm | I |
| 5.5 mm | I-9 |
| 5.75 mm | J |
| 6 mm | J-10 |
| 6.5 mm | K-10 ½ |
| 7 mm | |
| 8 mm | L-11 |
| 9 mm | M-13 |
| 10 mm | N-15 |
| 11.5 mm | P-16 |
| 12 mm | |
| 15 mm | P/Q |
| 15.75 mm | Q |
| 16 mm | Q |
| 19 mm | S |
| 25 mm | T/U/X |
| 30 mm | T/X |