For my background fabric for my baby jane, I decided to use an off-white kona cotton. Kona cotton in snow. It's fabulous. I bought 20 yards, and it came in one bolt of 16 yards and a folded bit of 4 yards.
The problem with buying 20 yards of fabric is that you have to wash it and then iron it all! It took awhile to iron it, and Lucy obviously lost patience with me and decided to take a nap!