9 mm knitting needle
9 mm
US 13 · UK 00 · Bulky
What this size is for
Super bulky yarn. A jumper takes an evening and weighs a great deal.
In each scale
| Diameter | 9 mm |
| US size | 13 |
| UK / Canadian size | 00 |
| Yarn weight | Bulky |
A US 13 and a UK 13 are not the same needle. This one is 9 mm; the British 13 is 2.25 mm. Buy by millimetre wherever the pattern allows it.
Nearby sizes
| mm | US | UK | Yarn |
|---|---|---|---|
| 6.5 | 10.5 | 3 | Chunky |
| 7 | — | 2 | Chunky |
| 8 | 11 | 0 | Chunky to bulky |
| 9 | 13 | 00 | Bulky |
| 10 | 15 | 000 | Super bulky |
Frequently asked questions
What is a 9 mm knitting needle in US and UK sizes?
US 13 and UK 00. The millimetre figure is the actual diameter and the only one that means the same thing everywhere.
Is a US 13 the same as a UK 13?
No. A US 13 is 9 mm; a UK 13 is 2.25 mm. The scales run in opposite directions — American numbers grow with the needle and British ones shrink — so the same number is two different needles.
What yarn suits a 9 mm needle?
Bulky. Super bulky yarn. A jumper takes an evening and weighs a great deal.
Why do the two scales run in opposite directions?
The British scale counts down from the thickest wire in a gauge, in the same way a wire gauge does — more drawing operations, higher number, thinner. The American scale simply counts up from the finest needle. Neither is wrong; they were never designed to be compared, and the only size where the numbers coincide is 4.5 mm, which is size 7 in both.