According to Patrick Mallucci
, a renowned British breast augmentation surgeon, the key aesthetic elements in perfect breasts are nipple position and the proportion between the upper and lower halves of the breast. A formula for perfect breasts is a 45 to 55 per cent proportion - that is the nipple sits not at the half-way mark down the breast, but at about 45 per cent from the top (see the deliberate demonstration on theSun). Apparenlty, for Posh Victoria Beckham's "unnaturally round" globes are the worst, and the model Caprice Bourret's are the best! Dr. Patrick's finding titled Concepts in Design for Breast Augmentation will be presented on at the first international conference on breast enlargement to be held in London.
Source: Scientists discover the formula for perfect breasts @ Dailymail