I had an A cup pre-BA. I wore xl tops. I lost 24 pounds post GCS high and am at 196. I have a lot of lean muscle ( woman comment positively on my legs). Post GCS at 220 pounds I had a 44A and 42 B bra. I fit comfortable in a 40 C and have on a 38D today which is supporting, I can easily put my hand under the side.
So I was told by several woman when I had XL tops on to get a smaller size and that was when I was 24 pounds heavier. I fit very well in my large tops and am looking for some tops that are more fitted at work.
I went to the Loft with three work friends at lunch Friday. They were looking to help me get a skirt for work and ended up getting a dress (I will wear next Friday), a pair of jean leggings and a beautiful ( I can not stress enough how pretty) pair of loose floral print pants, like a dress . When there I spotted a top I will get this weekend, It will be fitted and have the floral print pants and I will wear a cardigan and flats. Point being, after you have the BA you may want to rethink tops. Having a loose top can give the impression you are heavy. To each their own.
To answer your question my large tops fit awesome after the BA. My xl tops are in the closet in the back.
I love to have fitted clothing and shopping is very addicting. I need to lose some more off my tummy and oblique's. I am working on that

. When I do I will have a real need to buy a few more fitted tops.