Knitting needle sizes and their conversions
This is a quick reference to the different metrics in knitting needle sizes and their conversions. Most important thing to know is that while US and UK use the same metrics, their numbers run in opposite directions – US knitting needle sizes start from 0 and go up, UK sizes on the other hand start at 14 and go down from there. In Europe in general, we use the metric system. This means that we measure our knitting needles according to the diameter of the needle.
| Metric Size | US Size | UK/Canadian Size |
|---|---|---|
| 2.00 mm | 0 | 14 |
| 2.25 mm | 0 | 13 |
| 2.50 mm | – | – |
| 2.75 mm | 2 | 12 |
| 3.00 mm | 2.5 | 11 |
| 3.25 mm | 3 | 10 |
| 3.50 mm | 4 | – |
| 3.75 mm | 5 | 9 |
| 4.00 mm | 6 | 8 |
| 4.50 mm | 7 | 7 |
| 5.00 mm | 8 | 6 |
| 5.50 mm | 9 | 5 |
| 6.00 mm | 10 | 4 |
| 6.50 mm | 10.5 | 3 |
| 7.00 mm | – | 2 |
| 7.50 mm | – | 1 |
| 8.00 mm | 11 | 0 |
| 9.00 mm | 13 | 00 |
| 10.00 mm | 15 | 000 |
| 12.00 mm | 17 | – |
| 15.00 mm | 19 | – |
| 20.00 mm | 36 | – |
| 25.00 mm | 50 | – |
How to know what size knitting needles you have?
The most convenient way to know what size knitting needles you have is to use a special tool – a knitting needle gauge. It’s a thing with a bundle of holes in it, all in different sizes. Like this one:
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