How Do I Measure?

Before you start, put on a lightly lined bra :

  • no push-ups or compression sports bras
  • and grab a soft measuring tape. 

If you don’t have a measuring tape, it’s no big deal. A string and a ruler work too.

    • Measure around your ribcage, just beneath your bust. Make sure your measuring tape is parallel to the floor and straight around your back.
    • Exhale, and take your measurement.
    • Enter the measurement down below, where it says “Underbust Size.”
    • Now, measure around the fullest part of your bust. Just like step one, keep the tape parallel to the floor and straight around your back.
    • Make sure the tape is comfortably snug, but not too tight.
    • Enter this measurement below your ribcage measurement, where it says "Bust Size.” Then, click “Get My Size.”

    Free Virtual Fittings

    Our fit experts are here to help! Book a FREE 30-minute virtual fitting and get personalized guidance to find your perfect size.

    Size FAQs

    My measurements say I should order a size that’sdifferent than what I’m used to. Is that right?

    Yes! Sizing differs from brand to brand, and here at Pepper we’ve redesigned our sizing from the seams up. We recommend you trust your Pepper size calculated from your measurements to start.

    What should I do if I’m in between sizes?

    If you feel that you’re in between sizes, then we recommend choosing based on how you like your bras to fit. Do you like a snug fit? Order the smaller size. Do you like a more relaxed fit? Order the larger!


    This can also vary a little based on the specific style you’re looking at. Feel free to contact our team if we can help with specific advice!

    What are sister sizes, and why do they matter?

    Sister sizes are groups of bra-size equivalents that are related by cup volume, regardless of the band size and cup letter. For example, a 36A and a 38AA are technically the same size because the cup volume is the same. However, a 36A and a 38A are not equivalent sizes as the 36A cups will be smaller in volume. 


    The best way to use sister sizes is if your cup size feels good, but the band doesn’t. For example, if you’re a 36A, but the band feels too tight, you might like the 38AA better. Or, if the 36A band is too loose, then you might prefer the fit of a 34B.

    What size of swimwear should I get?

    Our swimwear will have the same perfect Pepper fit you know & love, so we recommend the same size as your fav Pepper bra + underwear. If you're new to Pepper, you can check out our ​​​​​​Fit Guide and take our handy Size Quiz for size recommendations.

    I’m breastfeeding/postpartum. Any tips?

    We recommend choosing styles that are soft, pliable and less structured for growing and changing bodies. Some of our favorites are: Supima® Cotton Wirefree BraLimitless Wirefree Bra or FeelGood Wirefree Bra. All of these styles will allow for some cup size fluctuations, so we recommend ordering the size that fits your ribcage measurement the best.

    My breasts are asymmetric (one is larger than theother). What should I do?

    Any breast shape can be asymmetrical, it's natural and common to be varying in size or placement. We recommend choosing the size that best fits your larger breast. Or, if there is a 2-cup size difference (or more), we recommend taking the average.


    Also, adjust your straps! Sounds simple enough but play around with the length for optimal comfort and to help your bra hug your smaller side.

    In terms of styles, we’ve found that bras with removable cups or light padding work best. Some of our favorites are: Supima® Cotton Wirefree BraLimitless Wirefree Bra or FeelGood Wirefree Bra