How to choose the right sports bra size for running?

To choose the right sports bra size for running, follow this two-step method:

1. Measure your band size: Wrap a tape measure snugly around your ribcage, just under your bust. Round to the nearest inch. If even, add 4; if odd, add 5.
2. Measure your cup size: Measure around the fullest part of your bust. Subtract your band size from this number—every inch equals one cup size (1" = A, 2" = B, etc.).

A well-fitted running bra should feel snug but not painful. The band should stay parallel to the ground and not shift during arm raises. esemotion offers custom sizing for private-label orders—we can produce any size from XS to 5XL.

A simple way to verify fit: you should be able to slide two fingers under the band, but not more. If the band rides up your back when you raise your arms, it is too loose. If straps dig into your shoulders, the band may be too loose and the straps are compensating.

Research published in the Journal of Sports Sciences shows that ill-fitting sports bras can reduce running efficiency by up to 4%. A correct fit minimizes breast displacement—which can exceed 14 cm during running—reducing discomfort and long-term breast pain. esemotion running bras are engineered with encapsulation cups and a wide elastic underband to keep everything securely in place.

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