Vintage Peter Pan cotton calico fabric, indigo blue and white, prairie girl style! This is really wide (56" across the selvages), 5+ yards.
There's some print flaws on this fabric, I believe it's probably a factory second. They're not terribly noticeable (at first I thought the color variation was a part of the design) and I think you'd never see them on a project with a few gathers or seams which would distract the eye.