610-695 Cc Implant on 5'2 110lbs Too Big? (photo)

You already have a very good result with implants that are "testing" the ability of your tissues and chest/breast diameter to support them.  They already look like obviously implanted and not very natural breasts, but apparently this is what you are aiming for.  You should be aware that implants of the size you are considering carry a higher risk of irreversible stretching and thinning of your skin and tissues, the emergence of visible implant wrinkling as a result of this thinning, symmastia where you lose the valley between your breasts (a deformity that is difficult to correct, etc.  All of these problems can lead to multiple surgeries attempting to fix them, and the "fixes" are expensive and not always successful.  Please keep all of this in mind as you decide whether to proceed with your plan.

You are already far beyond your chest limits with your current implants. Going larger still is going to lead to significant problems in the coming years.