Ptosis of the breast and the optimum position of the nipple in the non-ptotic breast have been defined. A descent of the infra-mammary fold in ptosis is demonstrated: the concept of the nipple infra-mammary distance is introduced and the optimum values are defined. The principle of relocating the infra-mammary fold in any form of mammaplasty where the nipple is elevated is introduced together with a precise method for defining the new level of the infra-mammary fold in relation to the proposed size of the reconstructed breast. Emphasis is placed on the aesthetic significance of avoiding inter- and extra-mammary scarring.