You will also need:
1 Pair Of 3.25mm (US3) Knitting Needles.
1 Pair Of 4.00mm (US6) Knitting Needles.
2 [2:2:2:3] buttons for Sweater with vents and Sweater
3 [3:4:4:5] buttons for Cardigan
Tension: 22 stitches and 28 rows to 10cm (4 in) over stocking stitch using 4.00mm needles. Adjust needle size if necessary to match the tension.