Materials:
Euroflax sport Weight 100g (270 yards)
Finished Sizes (bust):
XS 32-1/3 (3) skeins
S 36-3/4, M 41 (4) skeins
L 45-1/2, XL 49-3/4 (5) skeins
2XL 54-1/4 (6) skeins

Also
7-9 buttons (depending on size)
3-1/4 inch buttons (optional for split back)