Hi G. -
well, I have some different experiences than other women. My breast are two different sizes. Now I know that everyones breast are not identical, but I had a large C cup on my left, and a very small A on my right and on top of that they were different shapes as well. So, it was extremely noticable.
At 18 years old (I'm 41 now) I had breast augmentation on my right breast. The doctor did such a good job, that no one could tell that it was fake. This summer, I had to have that implant replaced and I also had a little lift on the other side (yes..i've had babies too.. and they do a number on them). woo hoo! again, no one knew except who knew that I had surgery. My breast are not these large melons plopped on top of my chest. They just look like normal boobs. It totally depends upon the doctor on how they are going to look...
But as a kid...I had a very, very smart mother. In order for people not to notice, we had to be very inventive to fill the other cup. The one that worked the best was like foam padding that fit inside the cup of the bra. The other things that we tried (but because I was extremely active, it didnt work as well) that looked the MOST natural, was an insert that women use who have had mastectomys. If you go to a Lady Grace store (not a catalog) the sales person can help you find one that will look the most natural. Unfortunately, they are very pricey. It can go from $15 to $400. It is a prothesis for mastectomy's.
But if you go to a store, they would be able to help you out with finding one that fits you and your wallet! They have a few stores in Mass, but none in RI. not sure where you are.
Good luck with your decision, and if you would like to ask me any questions, feel free.
L.