Hi girls!
The standard Allergan range of implants that MYA offer come in a high and low profile. High profile implants have a higher projection and a smaller diameter and low profile implants have a larger diameter and lower projection.
Low profile implants tend to be used less frequently as they are more suited to patients that have lost a lot of volume in their breasts. Your MYA surgeon will determine which implant is right for you based on your unique measurements.
I hope that helps you understand them a bit more. Please feel free to call your PC if you have any more questions.