1. Take in shirred panel on each side to fit chest. With so much fullness, you can blend to nothing about 4″ below panel instead of taking side seams in all the way to the hem.
2. Make sleeves or straps. This dress had shirred sleeves already. I cut cut them off and repositioned them to fit a smaller frame. For sleeveless shirred dresses, I have sometimes been able to make the sleeve/strap out of the excess fabric from taking in the side seams. If that doesn’t work, I make straps using pieces of decorative ribbon.
3. Hem if necessary. Luckily, this dress was an awkward short length on me, making it a perfect maxi dress for her.