To fit chest sizes 16" (18", 20") you will need 3 Sirdar Snuggly 4 Ply for the Matinee Coat and 1 each for the Bonnet, Hat, Mittens, Scarf and Shoes.
Suggested needles are US 1 and 3. You will also need a Cable Needle.
You will need 3 Buttons for the Matinee Coat and 1 for the Bonnet.