A couple of years ago I saw a story somewhere claiming that British women have the largest boobs, based on the size of the average bra sold.
That’s because British women are more likely to get properly fitted. Victoria’s Secret has made a fortune convincing American women they are all 34/As, 36/Bs, 38/Cs when in reality they are three to four inches in band size smaller, which conversely increases the cup size. If VS actually had to provide the range of sizes to properly fit the population they’re profit margins would plummet.