ThirdLove offers over 60 bra sizes from 32 to 44 band and bra cup sizes from AA to H cup, including our exclusive half cup sizes.
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Use our bra cup size calculator above to instantly calculate your size. Want to learn how to calculate your bra size yourself? Follow our easy steps below to learn!
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To find your band size, you will need your underbust measurements.
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Wrap a soft measuring tape around your body, just under where the bra band lays. Make sure the tape is level with the floor and isn't hiking or falling in the back.
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Use your measurement and the chart to determine your band size.
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In order to find your size, you will also need to measure your bust.
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Wrap the tape around the fullest part of your bust. Make sure the tape is level with the floor and fits snugly.
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Note down this measurement as you'll use it to figure out your bra size.
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Finally, to determine your bra cup size, you will need to calculate the difference between your bust and underbust measurement.
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Subtract your underbust measurement from your bust measurement.
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Use the difference in inches and your band size to find the corresponding bra size on the bra measurement chart.
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Returns & exchanges free for 60 days for all U.S. orders. Please try on the bra to ensure a good fit, making sure to leave the original tags attached. We only accept underwear in unworn condition, with original tags, in its unopened original polybag. Items marked final sale are not eligible for return or exchange. If something’s not right, we can help. Our Fit Experts are available via live chat, or email to answer any questions you might have.
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Styles in AA-H, including half cups
Earn points for every $$ you spend.
Take our quiz to find your perfect fit
is available over $35