I do some glamour (NOT why I’m having my BA) and lack of boobage has never been a problem. Just make sure you get the right poses and angles to show off what you do have. A lot of glamour tog’s I’ve spoken to were rather dismayed i have chosen to have a BA as they prefer natural (natural and BIG is first choice of course LOL!). Either way, just remember you’re getting these for YOU, not to get modelling jobs, otherwise you will end up unhappy.
In regards to size, see what your surgeon recommends and have a good chat with him about the sizes you are thinking of. Take pics of boobs you like the look of, and listen to the girlies on these forums, there’s a goldmine of information here
xx