Bra Fence, Idea By John Lee, 66-year-old Farmer, New Zealand

Many of the health problems associated with bras are due to fitting problems. Finding a correct fit can be very difficult for many women which has affected sales. Medical studies have also attested to the difficulty of getting a correct fit. Scientific studies show that the current system of bra sizing is quite inadequate.
Larger-breasted women tend to wear bras that are too small, and conversely, smaller-breasted women bras that are too large. Larger women are more likely to have an incorrect bra fit. This may be partly due to a lack of understanding of how to correctly determine bra size. It may also be due to unusual or unexpectedly rapid growth in size brought on by pregnancy, weight gain, or medical conditions including virginal breast hypertrophy. As breasts become larger, their shape and the distribution of the tissues within them changes, becoming ptotic and bulbous rather than conical. This makes measurements increasingly unreliable, especially for large breasted women. The heavier a woman's build, the more difficult it is to obtain accurate measurements, as measuring tape sinks into the flesh more easily. Finally, up to 25% of women's breasts display a persistent, visible breast asymmetry, which is defined as differing in size by at least one cup size. Ten percent are severely different, with the left breast being larger in 62% of cases. Manufacturer's standard brassiere sizes do not take these inconsistencies into consideration.
• Bra fit and breast reduction surgery
In a study conducted in the United Kingdom of 103 women seeking mammoplasty, researchers found a strong link between obesity and inaccurate back measurement. They concluded that "obesity, breast hypertrophy, fashion and bra-fitting practices combine to make those women who most need supportive bras the least likely to get accurately fitted bras." This led women in the study to choose too large a cup size (by a mean of three sizes) and too small a band size (by a mean of four inches). Other studies found that the most common mistake made by women when selecting a bra was to choose too large a back band and too small a cup, for example, 38C instead of 34E, or 34B instead of 30D.