21 years old/120 lbs/5'3"/no kids. Mod plus or high profile? 485cc (Photo)

I think that the high profile implant is more attractive for most women. It should also be a little narrower than the moderate plus implant. You don't want the implant to be wider than your natural breast. Based on your wish pictures, I would also suggest the high profile implant. Good luck!

Thank you for your question.
This question can best be answered after obtaining breast
measurements such as base width.
You must realize that profile of the implant basically
dictates how much the implant sticks out in the forward direction and by how
much the overlying breast skin is stretched.
There are low, medium, medium plus, and high profile designs
for both round and shaped implants.
When you increase the profile of the implant within an
implant of the same volume, you are essentially decreasing the diameter and
increasing its outward projection (height) giving it a more ball shape.
Low profile implants have wider
diameter and the lowest projection
Moderate profile implants have less
projection because of their wider diameter
High profile implants are
narrower at the base and consequently have more projection
High profile implants do generally provide a fuller look in
both the upper and lower pole. This is why breasts would appear to be more
rounded and augmented rather than natural. A natural look implies a slope in
the upper pole, and a curvature in the lower pole giving the breast
distribution ratio of 45:55. Whereas, with high profile implants, you may get a
50:50 ratio. If you want to avoid top heavy look, then go for the moderate plus
profile.
That being said, your chosen profile must be tailored to
your breast characteristics and measurements.
If your breast width is small, then a high profile implant
will be necessary to provide a better distribution of volume within the
breasts. If you have a wider breasts, then you may require low to moderate
profiled implants to avoid the “rock in a sock” appearance.

Also note that even if you do get high profile implants,
having them placed under the muscle is more beneficial compared to over the
muscle placement as the latter comes with increased risk of breast tissue
wasting.
Hope this helps.
Best of luck with your surgery!