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How to Measure Your Bra Size

It's estimated that a whopping 80% of women are wearing the wrong bra size. Comforting to know I'm not alone.

Thanks to, I learned that not only was I wearing the wrong cup size but band size too. I'm not surprised since I've never found my bras particularly comfortable and my weight has obviously fluctuated with being pregnant, nursing, etc.

Wondering if you're wearing the correct bra size? It's pretty simple to measure. 123underwear sent me a tape measure with the following instructions and I had a quick call with a consultant to confirm:

Project Bra Happy

Measurement A: Find your bust size
• With a soft tape measure, measure the fullest part of your bust. Be sure you are standing straight. If the measurement falls between inches (36.5, 32.1, etc.), the safer bet is to round up.

Measurement B: Find your band size
• Now measure around your rib cage, directly under your bust. The tape measure should fit snugly, but should not feel constricting. If you have an even-number measurement, add two inches. If you have an odd-number measurement, add three inches.

Find your cup size
• Subtract measurement B from measurement A. Then follow the chart below:

And just like that I went from a 36B to a 34C.

123underwear's owner Beverly Russina also offers the following professional tips on how your bra should fit:

Front of the bra…
• Underwire must lie flat against your rib cage. Breast tissue should not be billowing out from below the underwire. Basically, underwire should not be resting on breast tissue but on bone.
• Your breast tissue should sit comfortably within your bra cups – with no excess material. Breast tissue should not be billowing out the top or sides of your cups.
• The bridge of the bra must be flat between your breasts

Back of the bra…
• Your bra band lies straight across your back. It should not squeeze, dig or leave marks. It should stay in place and not ride up or down.
• Bra straps must stay in place. No rolling down or digging into your shoulders.

Always remember that your breasts should be perched upright in your cups. For truly proper support your breasts should be sitting – halfway - between shoulder and elbow.

So tell me, have you too been wearing the wrong size?

{I'm participating in a sponsored campaign called Project #BraHappy with 123underwear. All opinions expressed herein are my own.}