You will need

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

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

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

3.25mm and 4mm Needles
Stitch Holder
3 (3 : 4 : 4 : 5) Button for V Neck Cardigan
4 (4 : 5 : 6 : 6) Buttons for Round Neck Cardigan