Here is the original:
I turned the piece inside out through one of the holes. I measured again with the clothes pins :) and pinned where they were and sewed up the sides.
I turned it right side out and pinned the lining and sewed it with a small seam allowance.
Then I enjoyed it!
I think I might still do a little fine tuning but these tailoring activities have gone far too smoothly. I think waywardness is around the corner :) Have you tried it yet? You should!