How close the inner edge of your breasts are to one another without a bra after augmentation with implants depends on several factors. All women can have it, if that's what you really want, but there may be trade-offs. Width of the implant used (from side to side), positioning of the implant on your chest, submuscular vs. subglandular placement, the current inner edge of your native breast tissue, position of nipples on your breasts (if nipples far out to the side, the more centrally placed your implants are, the more eccentric on the breast mound will be your nipple position), and the cant (direction, inclination) of your ribs all affect where your inner edge will be. Even so, if smooth surface implants are placed beneath the muscle, you may have cleavage immediately after surgery but over time, muscular contraction against the implant can push it laterally so you lose your cleavage subsequently. Capsular contracture (scar around the implants) can change breast shape over time to a more globular shape (more projection, less diameter), widening the space between your breasts over time. To correct this, additional surgery is indicated.Hope the above simplified explanation is helpful. Like so many issues and problems in plastic surgery, the answer depends on your situation. Most often, women who request cleavage without a bra can have it, but not always, depending on what size they want to be and their other anatomic features.