Are my breasts normal? What is the average bra size of a woman at age 13, 19, or 40? Unfortunately, such statistics do not exist yet. The only studies on the subject have methodological flaws: they ask about the bra size of the wearer, not about measurements. With 80% or more women in unsuitable bras, this leads to a complete uselessness of the values.
That’s why decent survey results would be insanely handy. How big are my breasts in comparison, how much are they likely to grow, and how long are they likely to grow? All questions could be answered better.
Therefore: Let’s start a bra size statistic ourselves!
Please leave your age and measurements in the comments. You can do this anonymously, the email address is optional. It only takes a few seconds and helps to close a big knowledge gap. Of course, the results will be better the more people participate.
Of course, we don’t want to repeat the mistakes of the official market research groups, so we approach things a bit differently. That’s why I’d like to ask you for the results from three standardized measurements:
- your age
- your chest circumference (around the widest part of the chest) when inhaling
- your lower chest circumference (just below the base of the chest) when you exhale
Best all measured with the bare torso in a standing position.
Thank you very much for your help and I look forward to your comments!
Bra size statistics: first results
Intermediate status – evaluation
Thank you to all who have already left their values! You are the best <3
So far we have collected 60 usable data sets. The youngest donor was 11 years old, and the oldest was 50. We have recorded underbust circumferences from 56-95cm and breast circumferences from 61-136cm. The vast majority of contributions were made by 14-15-year-olds.
Now a look at the statistics. What can we already see from the data?
- Much is normal. In the diagram, the translucent data sets of an age group are stacked on top of each other. The areas where blue (for under bust circumference) and orange (for chest circumference) overlap shows how great the diversity is in the respective group. And that’s already with “only” 60 of us. We’re pretty individual. Cool!
- The older, the bigger the breasts. Not a surprising result, but it shows that our data is realistic. It’s a little easier to see the upward curve if you deactivate Blue Chest Bar in the interactive chart and look at the breast circumferences in isolation. Right now, the data looks like average breasts continue to grow linearly with age – or that younger generations’ breasts are getting smaller. I wonder if this impression will persist as we collect more data. Keep donating!
- Your ribcage grows until 17. While breast size doesn’t seem to show a strong relationship to age, the average chest grows until around age 17 and then settles somewhere around the 70cm underbust measurement. This is an exciting result because it supports the assumption that both bra manufacturers and official statistics are way off with their estimates of average bra size.
Will the patterns in the data solidify? Keep donating! Have you already donated? If you’re over a year older by now, your data is interesting for the next age category. Keep those wonderful numbers coming!
Why do women wear ill-fitting bras in the first place? What is the average bra size? And what is breast migration? Learn more in the Braradise Bra Bible, the ultimate bra knowledge collection!
This is ridiculous! Bra size varies hugely between women no matter their age, it’s about genetics, not age?! Not sure what this survey hopes to achieve.
Yes, it does, and that is precisely what the graph shows. The search word analysis of this page showed a significant need for reaffirmation in young women trying to figure out if their breast size is normal for their age. Hopefully, this survey helps them realize that it is.