For me it's not the size, more the shape, symmetry and how they look with the rest of their body. Clearly, a woman who is 5 feet tall will look a lot bustier with the same size implants than a girl that is 6 feet tall. If they go huge and the boobs still look good, it's fine by me. Depending on the surgeon and the patient, though, it's hard to foresee the results. Some boobjobs are just terrible, regardless of the size...either the surgeon did a horrible job or the patient's body just doesn't adapt to them well.