You will need

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

Hat
1 Ball for each size

Blanket
2 Balls

3.25mm and 4mm Needles
3.25mm Circular Needle
1 Button for Cardigan