I'm currently 5'3", 140 lbs. Need a breast lift and implant for sure, but what size?

Hello and thank you for your question. I want to start off by telling
you what I tell many of my patients: Do not focus on cc's or bra sizes
as many women see their friend with "x" number of cc implants etc and
think that they have an idea of what they want. There is a lot that goes into
implant selection -- your breast volume, the amount of cleavage you want
to achieve, your base width, your rib shape/projection, etc. Without seeing you and doing your
measurements or having photos to assess your starting point, it is
difficult to assess accurately your final breast size or shape. The
other thing to consider is that most women are not accurately sized for
their bras. Different bra companies are sized differently and employees
at various clothing stores will not use the same criteria to measure
one's bra size.The most important thing to consider
is really the size and look that is appealing to YOU with the implants
you choose. Many surgeons have sizing models whether using bras with
implants or computer simulation. I encourage you to discuss with your
surgeon many of these considerations when deciding which
implant and size to use during your surgery. Additionally, a breast
implant is a round object and has a certain diameter. Your base width
on each side of your chest will determine "how big of a ball" or what
diameter implant you can reliably go up to with a socially acceptable
cosmetic outcome. The implant will "augment" or increase the size of your breasts to an amount acceptable to you and your surgeon.  In your case, you will also benefit from a mastopexy or breast lift.  A mastopexy will help center your breast on your chest rather than have parts of it hanging onto your abdomen. Remember though that with any mastopexy, the surgeon
may be limited with how large of implants can be used for augmentation in order to
minimize tension and decrease chance for complications.My
patients will try on a sports bra and then
we pick the implants based on their measured breast base width. If
your base width were to support up to a 500cc implant, I would have you
try on the 500cc implants in the bra and then the 400 or 450 cc implants and
afterwards select the implant that made YOU the happiest. In reality,
don't
stress too much as this is not a HUGE difference and should be the fun
part of the process. =) Go with what is acceptable based on your
measurements and makes you happiest and makes sure to weigh the pros and
cons of the options you are considering. It is a good thing that you
are doing your research before making a final
decision.I hope this
helps answer your question!

You are correct that it will take both a full lift and an augmentation to get the look you like. As to size of implants, that cannot be determined without an examination.