I can't believe I didn't have a basic A-line skirt pattern that I know fits me. Last night I took the Barcelona Skirt pattern by Amy Butler and a copy of Sew What! Skirts and drafted one.
I used some quilting fabric from Spotlight which I think would be a bit too thick for quilting, but is just perfect for skirts and sewed away. I needed a few darts at the back, changed the shape a bit and added a facing. I traced a copy onto thick non fusible interfacing.