You will need:For Sweater: A pair of 5.5mm (UK 5 - USA 9) knitting needles, a pair of 6mm (UK 4 - USA 10) knitting needles, stitch holders. For Hat: A pair of 5mm (UK 6 - USA 8) knitting needles. For Scarf: A pair of 6mm (UK 4 - USA 10) knitting needles.
Hat
Sizes
49cm/19¼in around head x 19cm/7½in long with brim folded up