Unfortunately, you have not told us your bra size. If you are a 32 or 34 each 100 cc’s of implant corresponds to 1 cup size change. If you are a 36 or 38 each 200 cc’s of implant corresponds to 1 cup size change. Doubling the size of implants is often done with the misconception that this will double the amount of projection. However, if you look actual projection achieved by doubling the volume, you will find that projection increases only 20%. Remember your goal is to achieve beautiful breasts. Beauty is determined by several factors including symmetry, skin tone, position of breast on the chest wall, cleavage, nipple position and least of all volume. You may benefit from a simultaneous lift to reshape your breast tissue creating upper pole fullness, elevate them higher on the chest wall and more medial to increase your cleavage. 800 cc implants weigh close to 2 lbs, would not be stable long term, will extrude inferiorly and laterally requiring revision. There are better ways to improve the beauty of your breasts without excessive implantation.
Gary Horndeski, M.D.