Hi Abbie. Im not sure which hospital you will have surgery, as they say you can’t be more than an hour away in the car (depending on traffic). In reltion to your cup size, you will easily be a D with 380cc and even bigger with 410cc, as you are already a B cup. However, everyone’s body is different so that is a rough guess. I was not even an A cup, had 325cc overs and Im a big C small D. Im having my 2nd BA in December, as I wanted bigger in the first place but wasn’t allowed, as I was too small to begin with. Hope this helps x