Knitting needle sizes
23 knitting needle sizes. Metric, US and old UK knitting needle sizes side by side, with the yarn weight each size usually pairs with. Click a name for its full record.
23 of 23 knitting needle sizes
| Size | Metric (mm) | US | UK / Canada | Typical yarn weight |
|---|---|---|---|---|
| 2 mm (US 0) | 2 | 0 | 14 | 0 Lace |
| 2.25 mm (US 1) | 2.25 | 1 | 13 | 1 Super Fine |
| 2.5 mm (US 1.5) | 2.5 | 1.5 | — | 1 Super Fine |
| 2.75 mm (US 2) | 2.75 | 2 | 12 | 1 Super Fine |
| 3 mm (US 2.5) | 3 | 2.5 | 11 | 1 Super Fine |
| 3.25 mm (US 3) | 3.25 | 3 | 10 | 1 Super Fine |
| 3.5 mm (US 4) | 3.5 | 4 | — | 2 Fine |
| 3.75 mm (US 5) | 3.75 | 5 | 9 | 2 Fine |
| 4 mm (US 6) | 4 | 6 | 8 | 3 Light |
| 4.5 mm (US 7) | 4.5 | 7 | 7 | 3 Light |
| 5 mm (US 8) | 5 | 8 | 6 | 4 Medium |
| 5.5 mm (US 9) | 5.5 | 9 | 5 | 4 Medium |
| 6 mm (US 10) | 6 | 10 | 4 | 5 Bulky |
| 6.5 mm (US 10.5) | 6.5 | 10.5 | 3 | 5 Bulky |
| 7 mm | 7 | — | 2 | 5 Bulky |
| 7.5 mm | 7.5 | — | 1 | 5 Bulky |
| 8 mm (US 11) | 8 | 11 | 0 | 5 Bulky |
| 9 mm (US 13) | 9 | 13 | 00 | 6 Super Bulky |
| 10 mm (US 15) | 10 | 15 | 000 | 6 Super Bulky |
| 12 mm (US 17) | 12 | 17 | — | 6 Super Bulky |
| 15 mm (US 19) | 15 | 19 | — | 7 Jumbo |
| 19 mm (US 35) | 19 | 35 | — | 7 Jumbo |
| 25 mm (US 50) | 25 | 50 | — | 7 Jumbo |
Updated 2 Oct 2026