I'm currently altering a prom dress. Just taking it in by a couple of cm each side at the hip - should be no problem.
Outer is tulle with this really revolting (sorry, but it is) flock lace overlaid on it. The lace overlay hasn't been nicely overlapped at the side seams, so I assumed that I'd just scoop the dress inside out, pull the lining out of the way and whoosh up and down with the machine on the new seamline.
Except.....the manufacturer, in their wisdom, has somehow sewn the flaming lining into the same sodding seam. I can't pull it out of the way. I appreciate that this method stops the lining riding up, and it's a pretty good solution (short lining, giving the wearer the desired "Kardashian nude dress" feel) but boy, do I wish I'd looked inside the dress before I priced it.
Lesson learned. I'll be looking at dress construction as well as the fit, before I price in future.