Would 465cc smooth round HP xtra be too big for me? 32aa, 5'3, 117lbs (Photo)

The Crisalix simulation can give you an idea of size, but no simulation is completely accurate. On the simulation, the breasts tend to look further apart than they will actually be following surgery.

In terms of sizing, breast implants are not one size fits all. Some patients may desire a smaller size, where as others want something larger. 465 HP Xtra is not unreasonable, but it is on the larger end of the spectrum.

From the photos it appears you have a wider gap than the sample photos you provided. The implants you mentioned are going to give quite a bit of projection and will increase you multiple cup sizes. To say this is too big or too small for you really depends on your measurements and your goals for surgery. I encourage you to visit with a board certified plastic surgeon near you to discuss your goals for surgery and learn more about your options. I've included a video on implant selection that I hope you find helpful