800 cc breast implants are the largest volume made in the US. They are the largest for a reason in that there are significant unwanted effects that can result after undergoing an augmentation that size and implant. Each implant has a predetermined width associated with the volume - thus the bigger you choose, the wider each implant is (remember this happens on both sides)! A large implant will likely leave you with permanent cleavage and the implant extending into the "armpit" area as there isn't enough room on the chest to accommodate the entire implant (this isn't the case for all women, but accurate for most). Also, the weight of a larger implant will likely cause the skin to progressively stretch over time leaving you with the need for a lift sooner rather that later. Finally, the biggest concern I have about your story is that it seems you have a communication problem with your surgeon. This needs to be corrected before surgery so that both of you are in agreement. If you are miscommunicating now, it is very possible that you will end up with a result you didn't want. A problem much more difficult to solve after the fact. Schedule an appointment, write out your questions/concerns and have a conversation with you doctor. Best of luck.