Bra Size Calculator

Before you get started

Grab a soft measuring tape.
Make sure you’re wearing a non-padded bra.
Measure your bra size to the 1/8th inch or 1/2 centimeter for your most accurate result.
Use a mirror to make sure the tape is straight in the back.

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Step 1: Select your preferred sizing

A woman's torso indicating the location to measure the underbust, around the ribcage just below the bottom of bust

Step 2: Measure your underbust

Wrap a soft measuring tape just below your bust, making sure it’s tight and even in the back. Take your measurements to the nearest 1/8th of an inch or .5 cm.

Enter your underbust measurement

&inches

A woman's torso indicating the location to measure the bust, around the fullest part of the bust

Step 3: Measure your bust

Wrap a soft measuring tape around the fullest part of your bust. Make sure it’s tight and even in the back.

Enter your bust measurement

&inches

Enter your measurements to see bra size

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Bra Size Tips

Remember, bra size is an art, not a science. Bra construction, fabric stretch, the bra’s style line, and your personal comfort preferences are other important factors that can help determine your bra size. We recommend starting with the bra size our tool suggests. If it’s not a perfect fit, try your sister sizes.