Thank you for your question. The reason why the same size implant may look too big in a smaller shorter person while it may look too small in a larger taller person is because the size of the implant is not proportional to their breast size and body frame.It is important to take your goals into account. If you want natural appearing breasts then the implant size is chosen to be proportional to you. If you want an artificial look than an implant is selected to be larger than your frame.I recommend you seek a consultation with a board-certified plastic surgeon in-person to discuss your goals, examine you, review pictures you bring of others that you would like to look like, and go over before and after pictures so that you get a better idea of what type of results you can expect to get. Good luck!
Tall women with larger frames and broader chest, shoulders, and hips can often handle larger implants that would make smaller women's chests look overcrowded and heavier. Large implants on shorter patients with breast asymmetry will accentuate that issue as well. In addition, choosing an implant based on an aesthetic goal that exceeds your anatomic capacity may lead to complications and possibly revision. Kenneth Hughes, MD, Board Certified Plastic SurgeonLos Angeles, CA