How to Measure Your Bra Size

Ben Rosenfeld

Wearing the wrong bra size can ruin your day and an otherwise perfect outfit. These step-by-step measuring instructions will ensure a perfect fit every time.

Are You Wearing the Right Size Now?

Over 80% of women are wearing the wrong size bra right now!  Here are a few signs that you may be part of that majority: wrinkling in the cups, underwire poking the sides of your breasts, a band that rides up, cup spillage, slipping straps, gapping between the skin and the bra or a bra that hikes up when you lift your arms.  (Keep in mind that certain factors can cause you to change bra size: a weight gain or loss, a new exercise regimen, pregnancy, and a change of diet.) If you suffer from any of the fit issues above, head to a professional bra fitter—or bust out the measuring tape and follow the simple steps here.  If you get lost, want to ask a question or need help please contact us at

Step 1: Determine Your Band Size

Some people may find these steps easiest with some help from your best friend, or partner.  While braless or preferably wearing a non-padded bra, measure around the bottom of the band, directly under your bust. The measuring tape should be level and very snug. Round to the nearest whole number. If the number is even, add four inches. If it’s odd, add five. Your band size is the sum of this calculation. (So if you measured 32 inches, your band size is 36. If you measured 33 inches, your band size is 38.)

Step 2: Take Your Bust Measurement

Wrap the measuring tape somewhat loosely around the fullest part of your chest (at nipple level). Round to the nearest whole number.

Step 3: Calculate Your Cup Size

Subtract your band size from your bust measurement and refer to chart. Example: 37 inches (bust) – 34 inches (band) = 3 inches. That’s a 34C.

The difference (in inches):









Your cup size is:









So how can you tell if a particular style fits? Try these tips:

Bend forward at the waist, then slip on the bra and hook it. This ensures your breasts are completely in the cups.

Adjust the band. The back of the bra should be level with the front.

Make sure the bra is not too loose.  You should be able to slide only one finger underneath the band.

Fix falling straps. First, tighten the band, and then shorten the straps.

Put on a close-fitting shirt over the bra. If the cups pucker or your breasts bulge, you're not wearing the correct size.

Look at yourself sideways in a mirror. Your breasts should sit midway between your shoulders and elbows. If not, you need a more supportive and better-fitting bra.

If you need to go down a cup size for fit, go up one band size, and vice versa. For example, if a 34C is too big for you, move to a 36B.

Choose a bra that fits perfectly when secured on the outermost hook. As the bra naturally loosens over time, make the band taut by moving toward the tightest hook.

As always you can ask us questions at, and come shop at

Leave a Comment

Please note, comments must be approved before they are published