Sizing Your Nursing Bra: A Comprehensive Guide



Are you expecting a bundle of joy or are already a proud parent? Congratulations! As you navigate the beautiful journey of motherhood, one essential item you'll likely need is a comfortable and supportive nursing bra. But how do you find the perfect fit? Fear not, because we've got you covered with this comprehensive guide to sizing your nursing bra.

Understanding Your Changing Body

Pregnancy and breastfeeding can bring about significant changes in your body, and it's essential to choose a nursing bra that accommodates these changes. From fluctuations in breast size to changes in breast shape, your bra needs to provide the right support and flexibility.

Getting Started: Measurement Basics

How to Measure Your Bra Size at Home

Got a tape measure? Then you can size yourself!  If you don't have a soft tape measure, use a piece of string, mark it, lay it out flat and use your hard tape measure.

Step 1: 

Measure around your rib cage directly under your bust.  Ensure you pull the tape measure tight. Band sizes don't come in odd numbers they only come in even numbers so if you get an odd number you will need to round it up, never down because you don't want your band to be to tight.

Example: If you are measuring 31 in your band size you can round it up to 32. 

Step 2: 

Wrap the measuring tape somewhat loosely around the fullest part of your chest (at nipple level).

Step 3: 

Subtract the number from the fullest part of your breast from the number you measured under your rib cage and the result will be the inch difference.

 Example: 36 inches (cup, Step 2)  – 31 inches (band, Step 1) = 5 inches. That’s a 32DD.

Step 4: 

Use the charts below to figure out what cup size you are:



According to Sandi Simon, a fit consultant at Bra Smyth in New York City, here are a few telltale signs that you may not be wearing the right bra size:

  • Wrinkling in the cups
  • Underwire poking the sides of your breasts
  • A band that rides up
  • Cup spillage
  • Slipping straps
  • Bra that hikes up when you lift your arms

Cracking the Code: Finding Your Size

Now that you have your measurements, and bra size, it's time to find the best bra for you!
Most pregnancy and nursing bras come in standard sizes (e.g., 32B, 36C), but remember that your size may vary between brands.

Refer to the sizing chart provided by the manufacturer to determine and double check your size. Keep in mind that you will fluctuate sizes because your rib cage and  breast size changes during pregnancy and breastfeeding.

Finding the right nursing bra is crucial for your comfort and well-being during pregnancy and breastfeeding. Take the time to measure yourself properly, explore different styles and brands, and don't hesitate to seek professional fitting assistance if needed. With the right bra by your side, you can embrace motherhood with confidence and ease.

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