Whats the difference between high, mod, mod plus, low profile?

Profile refers to how much projection the implant has (how much it sticks out). A moderate plus profile implant with the same width as a high profile implant will be flatter (less projection), and will have a smaller volume.  

Each implant manufacturer offers a variety of implant shapes (round or more anatomical) as well as different implant profiles. Selection involves choosing an implant base diameter as well as an implant projection. Projection refers to the how far the maximum projecting point of the implant extends off the table for an implant set onto a flat surface. For round implants, each incremental implant diameter has choices for more projection (ultra high, high, xtra-full or full), average projection (moderate, moderate plus) and less projection (low, low plus). After an assessment of your tissues and goals a recommendation for implant diameter and projection can be made. A review of many questions about breast implants is available at the link below.

Thank you for the question. The difference between these implants have to do with the dimensions ( diameter and height)  of the implants. For example, the high-profile implant has a greater projection and a smaller diameter  compared to the moderate profile implant. The moderate plus profile implant as projection and diameter characteristics that fall between the moderate  profile and high profile implants.I prefer to have a wide selection of implants ( all profiles)  available in the operating room. I use  intraoperative sizers and place the patient in the upright position to evaluate breast size. Use of these sizers also allow me to select the breast implant profile (low, moderate, moderate plus, high-profile) that would most likely achieve the patient's goals. The patient's goal pictures are hanging on the wall, and allow for direct comparison.
I have found that this system is very helpful in improving the chances of achieving the patient's goals as consistently as possible.I hope this, and the attached link, helps.