here's what i was taught in my quilt guild.... buy a queen size batting, fold in half, cut on fold, fold each half in half the other direction and cut on fold again...that way, one queen size batt gives you 4 baby quilts...now make your quilt to fit the batt... this also means the quilt bat is 45 x 54... a nice size for baby quilts... AND you can use one length of 45" fabric for backing...I DO have to check for the 45...or buy 60 on sale... knit, fleece, upholstery fabric, and some cotton wovens are wide enough to use without piecing. even if you pay a bit more, it's only one length so cheaper in the longrun... it's easy to resize your blocks to fit the 45" width, go for easy, wash flannel at least twice, but 3 times is better...it keeps shrinking more than once.