In breast augmentation, choosing a breast implant of the right size and shape for you is the first step in the preoperative preparation, and also a very important step in determining the satisfaction of the operation, whose significance is as important as sculpting a nasal prosthesis that can satisfy the patient in rhinoplasty. First, the choice of breast prosthesis form 1, the current breast prosthesis mainly has two forms: round and anatomical (teardrop type). Teardrop type prosthesis is manufactured to imitate the natural breast shape, its conical design makes the transition to a flatter upper pole of the breast, the lower pole more plump. The teardrop prosthesis produced by the U.S. Magell company is a soft series, its softness and round prosthesis similar. My long-term clinical practice observation, teardrop type implants compared with round implants for half a year to more time after surgery, the shape is more realistic and natural compared to round implants. 2, because the teardrop type prosthesis filling material is high-quality memory super soft viscous silicone gel, with good morphological assurance, the surface of the breast prosthesis is flatter and smoother in the vertical position, unlike the round prosthesis, the surface of the prosthesis is easy to form waves in the vertical position, so in the chest wall tissue is thinner, thinner patients using the teardrop type prosthesis more advantageous, will reduce the use of round prosthesis brought about by the post-operative breast surface easy to It will reduce the problem of wave formation on the surface of the breast and the “round bowl-like” change caused by the excessive protrusion of the upper pole of the breast. 3.For patients with mild or moderate breast sagging, placing teardrop-shaped implants into the posterior space of the breast also has the effect of improving breast sagging. 4, of course, for the body is not too thin, thin chest wall tissue patients, round prosthesis is also a good choice, and in the price is lower than the teardrop prosthesis. 5, teardrop prosthesis due to the uniqueness of its shape, the surgeon’s technical level requirements are higher. The author over the years has concluded a set of proven surgical techniques to make teardrop-type prosthesis as easy to control as a round prosthesis. Second, the choice of breast implant size 1, in the clinic will often see too large breast implants caused by disproportionate or too small breast implants, resulting in too wide cleavage, while excessive protrusion of the breast to form a “nest”-like appearance and a variety of poor post-operative form. The reason for this is mostly due to improper selection of breast implant size. 2, in the past, there are many clinical methods to choose the size of breast implants, such as based on the patient’s height, chest circumference and other data to choose, but in clinical practice found that this method is very impractical, there are also large differences. Some methods have more measurement data and complicated methods, which should not be promoted. After nearly 20 years of clinical experience, the author has come up with a set of simple and effective methods for selecting the size of breast implants, which have received good results in clinical practice, as follows: (1) The width of the thorax. Measure the distance from the midline of the patient’s sternum to the anterior axillary line as H, H-4cm is the maximum diameter of the selected breast implant chassis. Of course, the final diameter of the selected prosthesis should be based on the patient’s original breast tissue thickness is appropriately reduced by about 0.5-1.0cm. The breast implant that meets this condition has a more pronounced cleavage after surgery, and the outer side of the breast is also fuller, both inside and outside, round and natural, effectively avoiding the disadvantages of the outer side of the breast void caused by insufficient diameter of the implant and excessive built-in or wide cleavage caused by excessive external placement. (2) After the diameter of the breast implant is determined, another data that needs to be determined is the protrusion of the implant, which determines the degree of breast forward. For patients who require a more natural look, the projection can be slightly smaller, while for patients who require a fuller look, the projection can be slightly larger, taking into account the patient’s preoperative breast condition. The choice of these two data finally determines the size of the chosen breast implant, i.e. the number of grams or milliliters of the implant. It is important to emphasize that there is no gold standard for breast implant size selection, and that the patient and surgeon should communicate fully before surgery, and that the final choice should be left to the patient. There is a relative, not an absolute, satisfaction with the post-operative size and shape, which both the surgeon and the patient should have a full understanding of.