US, UK & Metric conversion reference
| Metric (mm) | US Size | UK/Canadian | Yarn Weight |
|---|---|---|---|
| 2.0 | - | 14 | Lace |
| 2.25 | B/1 | 13 | Lace |
| 2.5 | - | 12 | Lace |
| 2.75 | C/2 | - | Fingering |
| 3.0 | - | 11 | Fingering |
| 3.25 | D/3 | 10 | DK |
| 3.5 | E/4 | 9 | DK |
| 3.75 | F/5 | - | DK |
| 4.0 | G/6 | 8 | Worsted |
| 4.5 | 7 | 7 | Worsted |
| 5.0 | H/8 | 6 | Worsted |
| 5.5 | I/9 | 5 | Aran |
| 6.0 | J/10 | 4 | Aran |
| 6.5 | K/10.5 | 3 | Bulky |
| 7.0 | - | 2 | Bulky |
| 8.0 | L/11 | 0 | Bulky |
| 9.0 | M/13 | 00 | Super Bulky |
| 10.0 | N/15 | 000 | Super Bulky |
| 12.0 | P/16 | - | Jumbo |
| 15.0 | Q/19 | - | Jumbo |
| 16.0 | Q | - | Jumbo |
| 19.0 | S | - | Jumbo |