You will also need:

For Hat and Mitts: A pair of 3.25mm (UK 10 - USA 3) knitting needles. Also for Mitts: A pair of 4mm (UK 8 - USA 6) knitting needles. For Scarf: A 4mm (UK 8 - USA 6) 100cm, 39½in, long circular knitting needle. For Balaclava: A 3.25mm (UK 10 - USA 3) 40cm, 15¾in, long circular knitting needle or set of double-pointed needles, a 4mm (UK 8 - USA 6) 40cm, 15¾in, long circular knitting needle or set of double-pointed needles, stitch holders, stitch markers.