I made a dressing gown for my Sybarite doll using a shirt I bought from a second hand shop. I cut the parts so that the sleeve cuffs and hem are from the hem of the shirt. I also got the edges with buttons and button holes directly from the shirt, which was nice, because I hate sewing in buttons and I am really bad at making button holes. The collar is a little piece from the shirt collar, so that also saved some work.
I like the neckline as it reminds the neckline of some historical dresses. I think I'll have to try this again later with fabric that is not this transparent.