Breast implants are designed to increase the size of the breasts into which they are implanted. The way in which breast shape changes is dictated by the type and size of breast implants used. Wider implants add cleavage, while narrower implants of the same volume increase the projection, or perkiness of the operated breasts. Anatomically shaped, otherwise referred to as contoured, or teardrop breast implants, produce more upper pole fullness, but less of the other characteristics, given that that at the same volume, more fill sits higher in the breast. Using larger breast implants may obviate the need for a mastopexy, or a breast lift, because the larger volume may be able to adequately take up the extra skin present in the cases of significant breast sagging or drooping.