After breast augmentation, the breasts swell from the trauma of surgery and the tissues become edematous. As the swelling subsides and the tissues begin to stretch from the weight of implants, the breasts begin to settle and take on a more natural breast shape. This is the "drop and fluff". Over the next few months, as the edema finally escapes and the soft tissues relax, the final shape becomes evident.As you second guess your choice of size, keep in mind that the difference between 325 ML and 350 ML would likely be undetectable to most people. It equates to less than 2 tablespoons. That being said, because most patients regret not going bigger, when deciding between two similar sizes, I usually council patients to choose the larger size. Assuming there is no emergent issue, patients should allow 3-6 months for the swelling to resolve and the tissues to soften before contemplating any changes. At that point, a detailed exam and a frank discussion with the surgeon will help delineate the best treatment option. Close follow-up with the surgeon is essential.