My experience has been quite a struggle. Make time to try on - everything. My current suit is actually a man's small size which gives me the width and space in the chest and shoulders, and fits round the hips too. I am fed up with women's sizes assuming that you are a Jessica Rabbit with non-existant shoulders, enormous pointy boobs and huge balloon hips. And what is this balloon jodhpur thighs all about? I tried on every suit I could including the hire gear on dive trips and if I saw someone who seemed to be the right size and shape I asked them if I could try on theirs.
Currently I have a suit that fits, a BC that fits, and a mask that fits. All currently out of date and I fear the future.