Stretch of a cotton cardigan?
I'm knitting a cardigan that buttons down the front out of 100% cotton fingerweight yarn, and I want to know how much it will stretch so I can make my calculations. The pattern says to knit everything 2 inches smaller than your dimensions, but I'm kind of busty and worried that it will gape around the buttons. I want to be able to wear small tees under it, and I still want it to be somewhat fitted. Right now I have it calculated so that everything is 1 inch bigger than I am. Will that stretch too much? Any suggestions for washing and blocking?
Pattern: Glamour Knits by Erika Knight, Chinoiserie Cardigan
Yarn: 100% cotton Softball from Valley Knits