Tips - Lengths of Circular Needles Available and Minimum Numbers of Stitches Required
| Needle size mm | 16in | 24in | 29in | 36in |
| 3.00mm | 48 | 72 | 90 | 120 |
| 3.50mm | 56 | 84 | 105 | 135 |
| 4.00mm | 64 | 96 | 120 | 150 |
| 4.50mm | 72 | 108 | 135 | 165 |
| 5.00mm | 80 | 120 | 150 | 180 |
| 5.50mm | 88 | 132 | 165 | 195 |
| 6.00mm | 96 | 144 | 180 | 216 |
| 6.50mm | 104 | 156 | 195 | 234 |
| 7.00mm | 112 | 168 | 210 | 252 |
| 7.50mm | 120 | 180 | 225 | 270 |
| 8.00mm | 128 | 192 | 240 | 288 |
| 8.50mm | 136 | 204 | 255 | 306 |
| 9.00mm | 144 | 216 | 270 | 324 |