You can use 3 mm (US 2.5) or 4 mm (US 6) knitting needles for this pattern. Or anything in between that. Any small amounts of DK wool will do - it doesn’t use much at all. Gauge/tension is not important.

March 22, 2013
I’ve updated my pattern for clarity, regarding the abbreviations and bind offs - both the PDF download and my blog post. If you’ve successfully used this pattern already, then it won’t be necessary to read the update. ;)