Thank you for your question! I can see that you prefer natural looking breasts. Before we talk about implants, I would like to discuss what constitutes natural looking breasts, and what factors play a role in creating them. Natural breasts have the following characteristics: The areola – dark pigmented region around the nipples – should not be large relative to your nippleThe nipple should be above the breast fold – inframammary foldThe 2 nipples should form an equilateral triangle with the notch of your breast boneThe breasts should not be saggingThe nipples should sit directly behind the part of the breast that projects the fullestThe breasts should appear symmetricalA recent study by Dr. Mallucci and Dr. Branford, titled “Shapes, Proportions, and Variations in breast Aesthetic Ideals,” gives us 4 set of ideals in beautiful and natural-looking breasts. They are as follows: An upward pointing nipple (angled at 20 degrees)A slope in the upper pole of the breastA tight curvature (convexity) in the lower pole of the breast (i.e., below the nipple)An upper pole to lower pole ratio of 45:55 (i.e., the percent of fill below the nipple should be 55% compared to 45% above the nipple)If your breasts meet these ideals and those I mentioned above, they will look natural. That being said, there are many factors that go into creating natural-looking breasts, and a combination of the right choices contributes to achieving the desired result. I mention some of these factors below. 1) The size of the implant – a large implant that exceeds your breast boundaries, or overly stretches your breasts, or is too round will make your breasts look unnatural. In fact, with larger implants there is higher likelihood of bottoming out (i.e., an empty upper pole, nipple sitting too high on the breast), double bubble deformity, implant malposition, implant visibility, breast sagging, and breast tissue wasting. So going big is good, but going beyond limits will get you in big trouble…pun intended. A board-certified surgeon will always determine a suitable range for the implant volume after conducting some breast measurements and this is called tissue-based planning. Measurements such as breast base width, the amount of breast skin stretch, nipple to breast fold distance under maximal stretch, skin quality, chest wall asymmetries, among others have to be looked into. The planning takes into account the effects of implants on tissues over time, risks of excessive stretch, excessive thinning, visible or palpable implant edges, visible traction rippling, ptosis (Sagging), and breast tissue wasting. The combination of these measurements will also help determine tissue coverage and the required implant volume to optimally fill the breasts. For example, if your breast base is very wide, we will require a higher implant volume to avoid the “rock in a sock” appearance. I am assuming your surgeon already took breast measurements and made the suggestion about the implant size based on them. As such, that would be best for you to attain a natural result. 2) The profile of the implant – How much the implant protrudes or sticks out in the forward direction influences how much stretch is put on the overlying breast skin, and excessively stretching the skin results in negative consequences. Although the profile has to be tailored to the width of your breasts, a high profile implant normally provides a more augmented look rather than a natural look. As such, going for a more moderate profile or a moderate plus would be better. 3) The shape of the implant – majority of surgeons prefer round and smooth implants, but if your breasts do not have a natural shape to begin with as we see in patients who have tuberous breasts, then you may require the use of anatomic implants (tear-drop shaped implants) whose lower half is more loaded in volume than the upper half corresponding with the desired natural look. 4) Incision placement – incision location not only determines the degree of trauma to breast’s soft tissues, exposure of the implant to breast’s endogenous bacteria, pocket visibility and control, but also the implant’s position vertically and horizontally relative to the chest wall. For example, compared to the tranaxillary (armpit) or the areola (around the nipple) incision, the inframammary (IMF) incision better allows your surgeon to lower the inframammary fold to increase its distance from the nipple. In many patients, the inframammary fold needs to be lowered in order to allow the implant to rest at a level that appears natural relative to the position of the nipple and areola, and in order to prevent the appearance of excessive upper pole fullness. I need you to realize that an overly full upper pole will make it obvious that you got implants to enhance your breasts. 5) Pocket – The decision to go behind the muscle or over the muscle has to do with the amount of soft tissue coverage – “padding” under the skin. Choosing a pocket that is tight with sufficient soft tissue coverage not only prevents implant visibility, palpability, and risks of excessive stretching on the breast, but also excessive implant movement into the outer or inner sides of the breasts. A hand-in-glove fit for the implant allows for a natural and long-lasting result. Your surgeon will do a pinch test in the upper pole of the breast to see how much “padding” you have. If you have less than 2 cm, then you do not have much padding and it would be best to go under the muscle. Generally speaking, if your ribs are visible under the muscle, then you do not have much “padding.” If however, you have more than 2 cm of tissue, then you have the option to go over the muscle or under the muscle. I think you might find it helpful to know that a study by Dr. Bengtson and Dr. Glicksman titled “Standardization of Bra Cup Measurements” has shown that the average implant volume required to increase the cup-size by 1 size is equal to 205 ccs. It was also found that normally breast augmentation increases the cup size by 2. However, it is also important to consider the profile as even a smaller implant with a high profile can increase cup-sizes by the same amount. All this being said, share all your motivations for surgery, expectations and goals with complete honesty to avoid miscommunication and post-operative concerns/regrets. Be as specific as you can about what you like regarding your breasts and what you don’t like. If you trust your surgeon and their judgment and the decision-making method used to choose the implant size, then you should be in good hands. Hope this helps