You will also need:
1 Pair Of 3.25mm (US3) Knitting Needles.
1 Pair Of 4.00mm (US6) Knitting Needles.
Stitch Holders
5(6,7,7,8) Buttons for each
Tension:
21 stitches and 40 rows to 10cm (4in) over garter stitch using 4mm knitting needles or the size needed to achieve the correct tension.