You will need

Round Neck Cardigan
12in Chest - 1 Ball
14in Chest - 1 Ball
16in CHest - 1 Ball
18in Chest - 2 Balls
20in Chest - 2 Balls
22in Chest - 2 Balls

V Neck Cardigan
12in Chest - 1 Ball
14in Chest - 1 Ball
16in CHest - 1 Ball
18in Chest - 2 Balls
20in Chest - 2 Balls
22in Chest - 2 Balls

Sweater
12in Chest - 1 Ball
14in Chest - 1 Ball
16in CHest - 1 Ball
18in Chest - 1 Ball
20in Chest - 2 Balls
22in Chest - 2 Balls

3.25mm and 4mm Needles
3.25mm Circular Needle for V Neck Cardigan
4 (4 : 5 : 5 : 6 : 6) Buttons for Round Neck Cardigan
3 (3 : 3 : 4 : 5 : 5) Buttons for V Neck Cardigan
3 Buttons for Sweater