Just looking for opinions. Example - by whatever weight loss method, you have dropped from a size 18 to a size 12. You see an amazing size 18 dress in a charity shop - just right for you, and upon examination, it would be easy to take it in to fit you.
Do you -
A. Buy without a thought
B. Not buy it - you have lots of choice now, let's leave it for a size 18 person who needs a lovely dress.
C. It would depend on whether you thought the dress would be much in demand from others (e.g. high end brand, fashionable style) or whether it's very much your style rather than popular fashion.
I am a C. I do make a point of taking it in in such a way that it can be let out again, in case I need to (see username!) but also if I want to re-donate it I can let it out so the size matches the label.