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When it comes to boobs, there’s no such thing as "one size fits all." If you are expecting, we recommend waiting until at least your 3rd Trimester to purchase a bra and to SIZE UP if you’re between sizes (don’t want to put too much pressure on the milk makers!) Pregnancy, hormones, gravity, weight fluctuations, ALL these things will change not only the size of your breasts, but may also expand your rib cage up to 2”! 

How to Find Your Best Fit- To best determine your current bra size, it is important to measure yourself. It’s easy! Just follow the steps below:

  • Wear a lightly lined or unpadded bra. 
  • Bust size. Wrap a measuring tape around your back, parallel to the floor, and across the fullest part of your breasts. Take a few breaths and let it naturally rest, not too tight and not too loose. Round up to the nearest whole number. 
  • Band size. Now wrap that measuring tape high up around your chest, right under your armpits. Round up to the nearest whole number. 
  • Cup Size. Determine your cup size by subtracting your band size from your bust size. Bust size - band size = cup size. For example, your bust size measured 38 and your band size measured 34. 38-34= 4. You would be a 34D and wear a size Medium. 
    (1= A, 2 = B, 3 = C, 4 = D, 5 = DD)
  • Use your band size and cup size to find your bra size on our chart below. 
  • Scroll through some of the testimonials on our homepage to see what other women have said regarding the sizes.
  • Drop us a line at heygirlfriend@shopavyn.com if you need sizing advice. We love talking about boobs! 
avyn size chart