Best Sports Bras for A–C Cup

Smaller busts need less bounce control but still deserve proper support and a great fit. We found sports bras that provide the right amount of hold without unnecessary padding, bulk, or that annoying gap at the top of the cup.

Our Top Picks

3 products

Brooks

Dare Crossback Sports Bra

4.4 (7,800)

Brooks tested this with thousands of runners, and it shows. The crossback design eliminates strap slippage, and the encapsulated cups provide individual support for each side. Medium impact, maximum comfort.

Wireless30A–40DDFull coverageMoisture-wicking polyester

$55

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Girlfriend Collective

Paloma Bra

4.3 (5,400)

Girlfriend Collective proves sustainability doesn't mean sacrificing performance. The compressive fabric is made from recycled materials, the colors are gorgeous, and it's one of the most comfortable low-impact sports bras we've tested.

WirelessXXS–6XLModerate coverageRecycled polyester/spandex

$42

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Under Armour

Infinity High Sports Bra

4.5 (11,200)

When you need zero bounce during HIIT, running, or CrossFit, this is the bra. The molded cups provide structure without bulk, and the mesh panels keep airflow moving. Adjustable everything means a custom fit.

Wireless30A–40DDFull coverageHeatGear polyester/elastane

$60

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How We Picked These

We tested 35+ sports bras in sizes A-C during various activities from yoga to running. Key criteria: no cup gapping, appropriate support level, breathability, comfort, and style.

Quick Buying Guide

Compression works great for you

Unlike larger busts, A-C cups can get excellent support from compression-style sports bras. They're often more comfortable and easier to find in your size.

Skip the heavy padding

Thick padding in sports bras adds bulk and traps heat. Look for thin removable pads or no padding at all for the most comfortable workout.

Racerback for running

Racerback designs keep straps in place during high-arm movements and distribute weight more evenly across your back.

Frequently Asked Questions

Do I really need a sports bra if I'm an A cup?

Yes. Even small busts experience movement during exercise, and the Cooper's ligaments that support breast tissue can stretch over time. A sports bra protects this tissue regardless of size.

Why do sports bras gap at the top for small busts?

Most sports bras are designed for C-D cups and scaled down. Look for brands that specifically design for smaller busts, or choose compression styles that conform to your shape.

Can I use a sports bra as an everyday bra?

Light-support sports bras can work as everyday bras, especially bralette-style options. However, high-compression sports bras shouldn't be worn all day as they can restrict circulation.