I cut the fabric 38" by the width. I barely cut the selvedge edges off. I then took the material to the serger and sewed across the bottom first and then down the side.
When this was all done, I decided to make a "pocket" bottom. I have no other word for it. I lined up the seam from the bottom and the side. I measured in 1 1/2" , pinned it and then stitched across.