I like Dr. Au's answer, and agree with much of what he has to say, especially his last sentence. But I would disagree that 450cc is "too big." And I don't know without exam, but after breastfeeding 3 kids, I suspect your breast skin is not overly taut.You want large, and that is perfectly fine, as long as your anatomy is compatible. Depending on your exact measurements, and your intra-operative pocket diameter, I would choose the lowest profile implants (widest base for a given volume) that will "fit" within your pockets and breast bases. I think 450cc may well work, but without an exam can only speculate based on my own personal experience with patients similar to you.I read all the time (here on RealSelf and elsewhere) that my plastic surgical colleagues are recommending high profile implants "for more upper pole fullness." High profile implants have more projection for a given implant volume, but also have the narrowest base diameter for that volume. Since the "proper" inframammary crease position is a "fixed" one (anything else is too high or bottoming out), the narrowest implant will have LESS upper pole fullness. Wider (moderate plus, or even wider moderate profile) implants will have the larger diameter that gives more implant volume and fullness below the collarbones. Sure, the HP implants give more upper pole fullness right after surgery before they have dropped, but aren't these surgeons seeing their patients more than once or twice post-op? If they do, they see that as gravity and scar maturation cause inevitable implant position dropping over 6-12 months, that upper pole fullness is lost when the narrower implants drop into final position.To summarize, HP implants give projection, but have the narrowest base and do NOT give upper pole fullness when dropped into final position. Moderate plus or moderate profile implants are wider and will, by mathematical definition, have more fullness when their lower edge is at the same exact crease position, simply by merit of their greater diameter. Forget volume and shape for a moment. If you put a 12cm diameter ball on a table and a 14cm diameter ball on the same table, which ball "sticks up" more in the air? The HP 12cm one? NO!!!But enough preaching from my soapbox.I believe much of what you are asking for is perfectly compatible and reasonable. You want as big as your anatomy allows. I don't think your anatomy would allow "too big," at least by your photo and goal description. You want upper pole fullness, not too narrow, a bit of "off the side" (commonly called side-boob), but teardrop-shaped breasts that don't over project ("torpedoes"). This would be best achieved by implants of the chosen size with the widest profile your pocket dimensions would allow, with submuscular placement and appropriate release of the inferomedial muscle fibers. I would caution you that you may not get to DD, and maybe not even a full D, but that your goals are compatible with "as large as your anatomy allows, and with the lowest profile implants in the volume chosen to center beneath the nipple areola complexes.Get additional consultations if you need them. I agree that HP implants look fake in a thin patient. Best wishes! Dr. Tholen