Each person is different, and much of the recovery process depends on the type of procedure performed. That said, it usually takes about three to six months for swelling to subside and for your breast to achieve a final shape, but it may take longer, particularly for patients who received radiation therapy for breast cancer treatment. Radiation permanently damages tissue at the microscopic level, which makes it harder for tissue to heal.
Also, keep in mind that final breast shape is often affected by gravity and tissue elasticity.