I recommend that you go and visit with one or several board certified plastic surgeons. Most plastic surgeons will perform a series of measurements of the chest area to get the best understanding of your tissues and what size implant will best work for you. Skin can only 'stretch' so much with any breast augmentation. In very general terms it is rare to go beyond a "two cup size" expansion, but it really depends on each individual. I hope this helps!
It is best to visit a board certified plastic surgeon for aconsultation to determine the most suitable size based on your measurements anddesired results. The surgeon will take aseries of measurements and provide a range of sizes that could safely be placedin your body. Based on that range, youwill get to choose the size that you feel most comfortable with. It is also helpful to bring a variety ofpictures to your consultation—pictures of breasts that are too large, toosmall, and just right. This allows thesurgeon to fully understand your desired outcome. Real Self and Love Your Look have helpfulonline galleries.