A new skirt recon from a favorite, but now outgrown, hoodie:
I had to wrestle some snaps off of it in order to add that width-expanding front section. The white buttons are hiding the unhappy under-snap fabric.
I drew up a little diagram for how one goes about making a top into a skirt:
Cut on the orange lines, and then sew the green piece in place to widen, if necessary. Fold over the top to make a casing for an elastic - and there you are. Easy-peasy.
Any suggestions for what to do with the hood?