How Much Can Saline Implants Be Overfilled?

Saline implants have a range with which they can be filled. A minimum fill and a maximum fill which varies depending on the implant size.  You can safely overfill an implant above its maximum fill volume by 10 - 15 %. Beyond that, the risk of deformation of the implant edge is high resulting in the look of implant rippling.

Many plastic surgeons routinely overfill saline implants to about 10% of their labeled volume.  There is a range on each implant that the manufacturer has for that particular implant.  The actual fill is up to the surgeon trying to achive the goals that you set out upon to achieve.  In your case, there are a few variables at play  Achieving the significant upper pole fullness that you have in the first photo may be difficult, depending on your skin resilience, how much extra skin you may have, etc.  One would have to examine you to determine this.  Typically one would also remove and replace the implant if you are going significantly larger, again that is for your plastic surgeon to determine.