Woman stretches in run bra outside in front of mountains


How your running bra should fit — and everything else you want to know.

Questions about bras for running? We’ve got you covered. Check out our fit tips, measuring guide, and solutions to common issues. You can also get started with our bra finder or go straight to shopping.

Fit fundamentals

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A woman in a black Brooks run bra with illustrated arrows on the back of the bra
A woman running in a navy Brooks run bra with illustrated lines and arrows around the cups of the bra
A woman adjusting the straps of her Brooks run bra with illustrate arrows pointing to the straps
run happy


How to measure your bra size

Women taking her own bra size measuement
  • You’ll need a flexible tape measure. It’s also best to wear a bra that doesn’t change your shape — no padding or compression. You can also just skip the bra.

  • Measure around your rib cage where the bottom band would sit. The tape measure should feel quite snug. If you get a fraction, round down to the nearest inch. Using , find your corresponding band size based on your measurement.

  • Measure around the fullest part of your boobs — which may not be the center — and round up to the nearest inch. Then subtract your rib cage measurement. The difference in inches is your suggested cup size. If you get a fraction, round up to the larger size.

Two women in run bras run across a pier with the ocean in the background.

How the Brooks Run Bra™ was made

Engineering the perfect run bra is a combination of science and art. Learn how meticulous research and runner insights influenced the perfect bra for your run.

Let’s find you a better bra

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Treat yourself to an instore fitting

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See all our bras in one place

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