You will need

24/26in Chest - 6 Balls
28/30in Chest - 9 Balls
32/34in Chest - 11 Balls
36/38in Chest - 12 Balls
40/42in Chest - 14 Balls
44/46in Chest - 16 Balls

3.25mm and 4mm Needles
Stitch Holders
3 Buttons