I do lots of crib sheets. When I can get flannel that's 44 inches wide, I use that for winter babies. JoAnn's snuggle flannel is too narrow and when you count in shrinkage, you must prewash or the sheet wont' fit the mattress, I have to have the wider fabric. After washing and drying in a hot dryer, press the fabric. Cut WOF 69 inches, then fold it into quarter. Cut 9 inch squares from each of the four corners. I use my serger for the seams and the ends, leaving the selvages for the sides. press under a seam allowance all the way around. Measure 8 inches from each seam down the side, (not the ends) and leave an unstiched space for the elastic. two pieces of elastic, 22 inches each threaded into the ends and you have a crib sheet in less than 30 minutes. Great use for licensed prints and even favorite sports teams. I don't know how many Mizzou and Cardinal's sheets I have made.