| Needle Size Conversion |
|---|
| Metric Size | US Size | UK Size |
|---|
| 2.0 mm | 0 | 14 |
| 2.25 mm | 1 | 13 |
| 2.75 mm | 2 | 12 |
| 3.0 mm | – | 11 |
| 3.25 mm | 3 | 10 |
| 3.5 mm | 4 | – |
| 3.75 mm | 5 | 9 |
| 4.0 mm | 6 | 8 |
| 4.5 mm | 7 | 7 |
| 5.0 mm | 8 | 6 |
| 5.5 mm | 9 | 5 |
| 6.0 mm | 10 | 4 |
| 6.5 mm | 10.5 | 3 |
| 7.0 mm | – | 2 |
| 7.5 mm | – | 1 |
| 8.0 mm | 11 | 0 |
| 9.0 mm | 13 | 00 |
| 10.0 mm | 15 | 000 |
| 12.0 mm | 17 | – |
| 16.0 mm | 19 | – |
| 19.0 mm | 35 | – |
| 25.0 mm | 50 | – |
|
| Metric – Imperial Conversions |
|---|
| Metric Length | Imperial Length |
|---|
| 1.0 cm | 0.39 in |
| 2.0 cm | 0.79 in |
| 3.0 cm | 1.18 in |
| 4.0 cm | 1.57 in |
| 5.0 cm | 1.79 in |
| 6.0 cm | 2.36 in |
| 7.0 cm | 2.76 in |
| 8.0 cm | 3.15 in |
| 9.0 cm | 3.54 in |
| 10.0 cm | 3.94 in |
| 15.0 cm | 5.91 in |
| 20.0 cm | 7.87 in |
| 25.0 cm | 9.84 in |
| 30.0 cm | 11.81 in |
| 35.0 cm | 13.78 in |
| 40.0 cm | 15.75 in |
| 45.0 cm | 17.72 in |
| 50.0 cm | 19.69 in |
|