How to Measure for Your Perfect Bra Size
Accurate measurements are the foundation of finding your perfect bra size. Follow these step-by-step instructions to measure yourself correctly at home.
Proper measuring technique for accurate bra sizing
What You'll Need
- A soft measuring tape (fabric tape measure)
- A mirror
- A non-padded bra or no bra
- A piece of paper and pen to write down your measurements
- A friend to help (optional, but can improve accuracy)
Before You Start
For the most accurate measurements, wear a non-padded bra or no bra at all. Stand straight with your arms relaxed at your sides when taking measurements.
Step 1: Measure Your Band Size
- Position the measuring tape: Wrap the measuring tape around your ribcage, directly under your bust where your bra band would sit.
- Keep it level: Ensure the tape is parallel to the ground all the way around your body.
- Breathe normally: Take the measurement while breathing normally (not inhaling deeply or exhaling completely).
- Snug but not tight: The tape should be snug against your body but not digging into your skin.
- Round to the nearest whole number: If you get a fraction, round to the nearest whole number.
Do
- Keep the tape parallel to the floor
- Make sure the tape is snug but comfortable
- Take multiple measurements to confirm
- Stand with good posture
Don't
- Pull the tape too tight
- Let the tape twist or angle
- Measure over thick clothing
- Hold your breath
Step 2: Measure Your Bust Size
- Position the measuring tape: Wrap the measuring tape around your back and across the fullest part of your bust, usually at nipple level.
- Keep it level: Ensure the tape is parallel to the ground and goes around the fullest part of your bust.
- Don't compress: The tape should rest comfortably against your bust without compressing your breast tissue.
- Round to the nearest whole number: If you get a fraction, round to the nearest whole number.
Do
- Measure at the fullest part of your bust
- Keep arms relaxed at your sides
- Stand straight with good posture
- Take multiple measurements to confirm
Don't
- Compress your breast tissue
- Lift your arms up
- Measure while wearing a padded or push-up bra
- Let the tape slip down in the back
Step 3: Calculate Your Cup Size
- Find the difference: Subtract your band measurement from your bust measurement.
- Determine cup size: Each inch of difference corresponds to a cup size:
- 1" difference = A cup
- 2" difference = B cup
- 3" difference = C cup
- 4" difference = D cup
- 5" difference = DD/E cup
- And so on...
Step 4: Determine Your Bra Size
Combine your band size and cup size to get your bra size. For example, if your band measurement is 34 inches and your bust measurement is 37 inches, the difference is 3 inches, which corresponds to a C cup. Your bra size would be 34C.
Common Measuring Mistakes to Avoid
Measuring over a padded bra
This adds extra inches and will result in cups that are too large.
Pulling the tape too tight
This will give you a band size that's too small and uncomfortable.
Letting the tape sag
The measuring tape should be parallel to the floor all the way around.
Measuring while inhaling deeply
Take measurements while breathing normally for the most accurate results.
Special Measuring Considerations
For Asymmetrical Breasts
Most women have some degree of asymmetry. Measure across the fullest part of the larger breast, and choose bra styles that can accommodate the difference, such as those with stretch lace or removable padding.
For Pendulous or Softer Tissue
You may want to take two bust measurements: one standing and one leaning forward at 90 degrees. The leaning measurement helps account for all breast tissue. Use the average of these two measurements.
For Post-Mastectomy or Reconstruction
Consider working with a professional fitter who specializes in post-surgical fittings. They can help you find the right bra for your specific needs.
For Pregnancy and Nursing
Your bra size will change throughout pregnancy and nursing. Measure yourself every trimester during pregnancy and every few months while nursing to ensure a proper fit.
When to Seek Professional Fitting
While measuring yourself at home is convenient, consider getting a professional fitting if:
- You've never been professionally fitted before
- You've recently experienced significant weight change
- You've gone through pregnancy or menopause
- You've had breast surgery
- You're consistently uncomfortable in your bras
Next Steps
Now that you know how to measure yourself accurately:
- Use our Bra Size Calculator to confirm your size
- Learn about different Bra Styles to find what works best for your shape
- Check our Complete Bra Size Guide for more detailed information