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Did you know that most women wear the wrong bra size without realizing it? The most common mistake is wearing a band too big and having the cup size be too small. In addition, most women are unaware of the many different types of bras on the market today. So there’s a great chance you can find a bra that will fit your body perfectly no matter what you wear. Use our Bra Size Calculator below to find a great bra size starting point. You can then use sister sizing to further fine-tune until you find the best bra size that matches up with your unique personal preference.

HerRoom Bra Size Calculator

You will need:

  • A non-padded bra
  • Measuring tape
Calculate Your Bra Size In 3 Easy Steps
Calculate Your Bra Size

Step 1. Measure for Band Size
  • A. Measure your underbust using a tape measure, making sure the tape is parallel with the ground. It should not be loose or binding. Exhale to get the smallest measurement possible.
  • B. Find your number (inches or centimeters) and enter it in the box below. Be sure to round all fractional measurements to the nearest whole number.
My band
measurement is:
inches or centimeters
Calculate Your Bra Size
Step 2. Measure for Cup Size
  • A. While wearing a non-padded bra, stand straight with your arms at your sides and measure the fullest part of your bust. Make sure the measuring tape is parallel with the ground and not loose or binding.
  • B. Find your number (inches or centimeters) and enter it in the box below. Again, round all fractional measurements to the nearest whole number.
My cup
measurement is:
inches or centimeters
Step 3.
Calculate



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