How to Figure Out Your Bra Size Easily

Did you ever wonder how to figure out your bra size? Did you know that your bra size will change over your lifetime?  If you’ve been pregnant, lost or gained weight, started or stopped breastfeeding, etc. chances are your bra size is not the same as it was before.  For years, I have had an awful time trying to find a bra that really fit the right way.  The top never fit smoothly and no matter what size I chose, I couldn’t seem to fill out the cups properly. It was always too big or too tight. This post has been sponsored.

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How to figure out your bra size

How to Figure Out Your Bra Size

Of course, I have been buying the same size bra since my first child was born (way too long) and I never even thought that I might need to get a different size. I just figured I was oddly shaped. After my daughter was born, I needed a larger bra size because I gained weight and was dealing with all those new hormones. Over the years, I lost weight, had another baby, gained weight,lost weight again and got older. I’m not built the same way at 47 as I was at 27 so it only makes sense that my bra size is not the same.

Aerie has this handy infographic that will explain how to fix common problems with bra fit. I learned what it means when your straps are too tight or when the cups don’t fit properly. It turns out that I had a two fold problem.  Not only did I need to go down a band size (36 to 34), I needed to go UP a cup size (B to C). I kept thinking that if I couldn’t fill out the cups of a 36B, I must need a 36A but of course that didn’t fit properly either. It turns out that the cups were not fitting properly because the straps were too loose and the straps were too loose because the band was too big. Problem solved.

You can learn more about troubleshooting your bra fit, fun facts about bras and 9 bras that every girl needs by visiting

What kind of bra fit troubles are you experiencing? 



  1. With being pregnant it seems like my bra size is changing monthly. I need to look into maternity bras that grow with you.

  2. These are some really helpful tips. It’s always tricky to figure out the right bra size and I wonder if I really have the right one.

  3. I always tell my wife that if she has trouble figuring out the size to just let me help!  😉

  4. Katharine Godbey says

    I just ordered some new bras and disappointed to find they didn’t fit properly. They were even the same size as my current ones but something about them was different. Next time I’ll be checking my size instead of relying on the size labels of my current ones. Thanks for the helpful tips!

  5. Very timely topic for me – I am so not fitting in my bra – need to get a good measurement!