| Needle Size Conversions | ||
| UK | Metric | USA |
| 14 | 2mm | 0 |
| 13 | 2.25mm | 1 |
| - | 2.5mm | - |
| 12 | 2.75mm | 2 |
| 11 | 3mm | - |
| 10 | 3.25mm | 3 |
| - | 3.5mm | 4 |
| 9 | 3.75mm | 5 |
| 8 | 4mm | 6 |
| 7 | 4.5mm | 7 |
| 6 | 5mm | 8 |
| 5 | 5.5mm | 9 |
| 4 | 6mm | 10 |
| 3 | 6.5mm | 10.5 |
| 2 | 7mm | - |
| 1 | 7.5mm | - |
| 0 | 8mm | 11 |
| 0 | 9mm | 13 |
| 0 | 10mm | 15 |
| - | 12mm | 17 |
| - | 15mm | 19 |
| - | 20mm | 36 |
| - | 25mm | 50 |
| Crochet Hook Conversions | ||
| UK | Metric | USA |
| 14 | 2MM | - |
| 13 | 2.25mm | B/1 |
| 12 | 2.5mm | - |
| - | 2.75mm | C/2 |
| 11 | 3mm | - |
| 10 | 3.25mm | D/3 |
| 9 | 3.5mm | E/4 |
| - | 3.75mm | F/5 |
| 8 | 4mm | G/6 |
| 7 | 4.5mm | 7 |
| 6 | 5mm | H/8 |
| 5 | 5.5mm | I/9 |
| 4 | 6mm | J/10 |
| 3 | 6.5mm | K/10½ |
| 2 | 7mm | - |
| 0 | 8mm | L/11 |
| 0 | 9mm | M/13 |
| 0 | 10mm | N/15 |
| - | 11.5mm | P/16 |
| - | 16mm | Q |
| - | 19mm | S |
Yarn Weight Conversions | ||||
| UK | USA | AUSTRALIA | ||
| 1 Ply | Laceweight | 2 Ply | ||
| 2 Ply | Fingering | 3 Ply | ||
| 3 Ply | Sock | 3 Ply | ||
| 4 Ply | Sport | 5 Ply | ||
| Double Knit / DK | DK / Light Worsted | 8 Ply | ||
| Aran | Worsted | 10 Ply | ||
| Chunky | Bulky | 12 Ply | ||
| Super Chunky | Super Bulky | 14 Ply | ||