So I'm having some difficulty picking out my BM dresses. My sister (who is also my MOH) is approx. a size 18, F cup-ish chest, and approx. 5'5. I don't know what kind of style/shape will be flattering for her... And, of course, the sample sizes that I've seen so far in stores are only a size 12 or something. Any advice on what might be a good fit?? Something more structured vs. really flowy?? I've tried asking her what she likes or what she thinks, but she always just kinds of shrugs me off and says something that usually amounts to "its your wedding, whatever you want..." I just really want to make sure that I find something that will flatter her, but I feel like that will be really hard if she can't try it on before she orders it.
I know that every person is different and what looks good on them will vary between people, but even just some general ideas, guidelines, advice, or tips would be helpful! TIA!