According to a survey British women's breasts are enhancing with each generation (the average bust size in the UK is now 36C, whereas a decade ago it was 34B). With these results showing up and women seeking specialist fitters to get their bras custom-made, UK's leading smalls supplier, Marks & Spencer, (first High Street brand) has increased its current range by three sizes, right up to a J cup to meet the ever-increasing demand for bigger bra sizing. Soozie Jenkins, head of M&S's lingerie design says:

We noticed a definite trend among younger women needing a larger cup size. Even if women did manage to track down a larger size, it was more than likely to be unflattering, unfeminine and seriously unsexy - like two hammocks slung over their shoulders.
The occasional cups and straps problem have been overcome by the company's advanced designs which combine comfort without losing style or sex appeal and also tip you on choosing the right kind of bra and things one should be very careful while opting for one.
Via: Dailymail