Holy moly! Stranger! Welcome back!
You would probably want to go to at least 800cc, although that would be less than a cupsize difference. I'd even be inclined to say to go to at least 900cc, although if you're going that far, might as well just go to 1000cc and call it a day. In for a penny, in for a pound, and all that.
The shells would of course be rated for 800cc, and you would be getting about 20% overfill. Which isn't at all uncommon, depending on who your surgeon is.
Regardless, rather than trying to aim for a specific CC amount, you could just tell your surgeon a) go bigger, don't stay the same size, b) you want them to be perkier, a little more gravity-defying ('fake' or however you care to phrase it), c) that you wouldn't be adverse to going to 1000cc or very close to that. If you're feeling particularly bold, you could just tell your surgeon "fill 'em up as best as you can". I know some surgeons will run with that, whereas others (95% of the surgeons out there) will play it extremely conservatively. If you say "I just want them to look good", then don't be surprised if they end up no bigger than they are today. Possibly smaller.
Going with the 1000cc goal, the overall increase will be quite modest, certainly in proportion to what you currently have. I'd even suggest going to 1200cc, but I suspect that number alone would make your head spin. And quite possibly your surgeon's.
People get weird when it comes to looking at numbers like that.
If we were to invent a new unit of volume measure, where 1000cc works out to 22 blerbs, then saying "I want to go to 24 blerbs" doesn't sound too wild and crazy. But when working with CCs and you suddenly cross the 1000 threshold, most people start getting a bit weirded out by it. Just like most women (in the under D-cup category) get weirded out at the thought of being fitted for a D-cup bra; oh the horrors! best to stick to a "really full C" cup, right?
I don't know if this was helpful, or just me rambling incoherently.
It's been a long time since ive posted an I'm back for some help.
If you remember me you may remember I have implants now. I have suspected a slow leak in one of them an have an appt on Dec 15th to find out what's going on.
I'm also gonna discuss an implant swap an wanted some help with sizes.
I have 700<725 & 650<675 68HP an the 725 width is perfect an actually could be a tad wider. If I go to 800<850 is that 150cc gonna make a large enough difference that I'll notice?
I need it to fill out my skin since I've had these for 7 yrs an they hang too realistically.
Any help would be appreciated as I've forgotten a lot of the lingo an logistics of implants. TIA