Answer (1 of 3): It’s mostly a estimate from multiple bra fitting events and professional bra fitters that actually know how to measure for a bra properly. As I recall the number “80%” made its way into public awareness through Oprah’s bra fitting event years ago. The number seems to be due to ho
Are 8 Out of 10 Women Really Wearing the Wrong Size?
How to wear a bullet bra - Quora
How to wear a bra properly - Quora
Where did the phrase 80% of women wear the wrong bra size come from? - Quora
In bra size, when there's an E, F, G, or H, what are the equivalents in DDDs? - Quora
History of the bikini - Wikipedia
What is the meaning of the measurement (36-90) written on a bra? - Quora
Is there a bra size difference between 38DDD and 40D? - Quora
Why is it so uncommon for me to find a 30C bra size? - Quora
80 per cent of women are wearing the wrong bra size
SIGNEALA Sports Bra for Women Longline: V Neck Wirefree Medium Impact with Built in Bra for Workout Yoga 2 Pack at Women's Clothing store
Is it true that most women wear the wrong bra size? If so, why? - Quora
What is the average bra size in America? - Quora