When it comes to deciding what approximate breast size you wish to achieve, the best advice I can give you is that you should be guided by your physical frame. Indeed, you may in fact be limited by it. In my practice, I select implants based upon your chest measurements, the quality of your breast skin and the size of your breasts prior to surgery.
I perform breast augmentation through a peri-areolar or inframammary approach and I place that vast majority of implants at least partially beneath the pectoralis muscle. My patients are welcome to select either saline or silicone filled breast implants. Silicone filled implants can in some cases achieve a more natural feel and may be a particularly attractive option for women with less breast tissue prior to surgery.