Pants to shorts
Elastic and top stitched waistband:
Nb how to add a drawstring to an elastic waistband; sew buttonholes in the waistband before folding/attaching, and thread the string through the top stitched channels
Use the top stitched elastic to hem the Hayley dungarees?
Bias bound corners or Vs: https://blog.fabrics-store.com/2016/11/24/how-to-bind-inverted-corners-with-bias-tape/