5-6 Inch Gap Between Natural Breasts- What Can Be Done? (photo)

Thank you for your question. You would actually be a good candidate for a mastopexy (breast lift surgery). On its own, a breast lift does not anatomically decrease the distance between the breasts, but it changes their shape significantly, making said distance less noticeable. If you wish to have larger breasts, you could undergo an aug/pexy, which is a breast augmentation with implants performed at the same time as a mastopexy. In terms of selecting a breast implant profile, the profile does not really affect the cleavage width.

Cleavage is one of the characteristics that’s associated
with physically attractive breasts.For
this reason, it’s not unusual for patients to desire this anatomic
feature.Unfortunately, this isn’t
always possible because of specific anatomic restraints that they may have. Your
pictures suggest several areas of concern.These include significant breast sag, a lateral sloping chest wall, a
mild tubular breast deformity and lateral displacement of your breast tissue.Although
you would benefit from submuscular breast augmentation and bilateral breast
lift surgery, this might not entirely accomplish your aesthetic goals.It’s
important to realize that breast implants need to be centered beneath the
nipple areola complex to avoid secondary distortion.When the nipple areola is displaced laterally,
it can only be moved so far inward during a breast lift procedure without
adversely impacting breast aesthetics.It’s also important to realize that underlying chest wall abnormalities
can impose limitations on your final result as well. Under
these circumstances, breast augmentation performed in combination with breast
lift surgery would be expected to significantly improve breast aesthetics.Unfortunately, the amount of cleavage would
be limited by the lateral position of the breasts and the shape of the
underlying chest wall.

Thank you for your question and the photos. I see the truth in other comments and will mention another possibility for you to think about options.  One possibility may be to perform breast lift supplemented with some modest fat grafting around the perimeter of the breast.  You are only 20 years old and your breasts are going to change as you age, especially if and when you have children. If you get implants now, you will almost with certainty need revisions or redo in the future.  Also, at your age, wide heavy implants will pull on your tissues and thin them out over time. This could make revisions problematic in the future.  If you get a breast lift with modest fat grafting now, you may be able to postpone surgery with implants to a later time.  Just a thought. To be sure you qualify for something like this, see two or more board-certified plastic surgeons in your area for a full and complete evaluation to make sure you are a good candidate and that it is safe for you to have surgery.  See a surgeon who is experienced in fat transfer.  I hope this helps.