It can be very confusing when three different surgeons give you three different opinions. Unfortunately, it's quite common because plastic surgery is just as much a form of art as it is a form of science. particularly when placed under the muscle, but because we size with actual implants, to me it is the best teaching tool. It is not uncommon in my own practice for patient to bring a friend or family member and a variety of different blouses and spend a good deal of time looking at the implants well before surgery. So here's some basic thinking that may be of help As a general rule when my patients size their implants I like them to look at themselves with the actual implants in place in a testing bra. This is not a perfect teaching tool because implants can lose some projection to you: When you look at implants on your frame don't just think about the size of the breast, but think about how it balances with the width of your shoulders as well as your hips. If an implant as to wide it will make you look top heavy, if an implant is too narrow it will look like a torpedo. In my own practice I try to focus on this relationship, and to me the width of the implant is almost more important than the volume itself. Once you find the width of the implant that gives a nice overall balance with the hips then you can change the cup size by going high, moderate or low profile. If you're agonizing between two sizes I generally recommend you go slightly larger, because it is very rare to hear patients say," I wish I had gone smaller". Sometimes a patient who needs a breast lift is encouraged to go with a larger implant to to try and avoid the lift. I think that this is a mistake. I personally feel that it's better to get the size breast you want and let the lift happen if it's necessary. Lastly, as a slender person it is always harder to have a more natural result. Patients with less breast tissue do not provide as much camouflage to help hide the implant. I always prefer a submuscular implant because it adds one more layer of tissue to help hide the implant from the outside world. In very slender patients I prefer silicone gel implants because they tend to look more natural as well. Even though you are slender, pick an implant that is wide enough to fill the chest appropriately. If you go too narrow, it can sometimes looked even less natural, smaller is not always more natural looking. I hope these things that I've said are making sense, I hope I've been able to add some clarification in sizing for you. Best of luck with your upcoming surgery.