Everything You Need to Know About Bra Sister Sizes

Bra sister sizes can help you find the best fit when your regular size feels uncomfortable or doesn’t seem right. Understanding sister sizes is crucial for ensuring you get the most comfortable and supportive bra fit. Whether you’re between sizes or need a new size for a different brand, this guide will help you understand how to find your bra sister size. 📏💖

SISTER BRA SIZE CALCULATOR

What are Bra Sister Sizes?

  • Definition: Bra sister sizes are different sizes that can give you the same cup volume but a different band size. Essentially, sister sizes are sizes that differ by one band size up or down and one cup size up or down. 👗
  • Example: If your bra size is 34B, your sister sizes are 36A and 32C. These sizes will give you the same cup volume, but the band size will be different. 📏

How Sister Sizes Work

  • Band Size Changes: If the band size increases by 1 (e.g., from 34 to 36), the cup size needs to decrease by 1 letter (e.g., from B to A) to maintain the same volume. Likewise, if the band size decreases by 1 (e.g., from 34 to 32), the cup size increases by 1 letter (e.g., from B to C). 🔄
  • Why Sister Sizes Matter: Sister sizes help you find a better fit if your current size feels too tight or loose in the band or cup. It's especially useful when trying new brands or shopping online without trying on the bras first. 💡

How to Find Your Sister Size

  • Step 1: Find your current bra size.
    If you're not sure about your size, use a bra size calculator to measure your bust and underbust. 📏
  • Step 2: Use the sister size chart to find your sister sizes.
    Here’s a simple chart for reference:
Current Size Sister Size 1 Sister Size 2
34B 36A 32C
36C 38B 34D
32D 34C 30DD
  • Step 3: Try on your sister sizes.
    Once you’ve identified your sister sizes, try them on to see which one gives you the best comfort and support.

Why Sister Sizes Are Useful

  • Better Fit Across Brands: Different brands may have slightly different sizing, so your sister size may work better in a different brand. 📦
  • Adjusting for Changes: If your bust size fluctuates, finding your sister size can be a quick solution without needing to completely change your bra size. 🔄
  • Comfort: If your current bra is too tight in the band or too loose in the cup, trying on your sister sizes can offer better fit and comfort. 😌


"Find your perfect bra fit by exploring your sister sizes today!" 😊
If you’re between sizes or unsure about your fit, use your sister sizes to find the most comfortable and supportive bra for you!

Bra Size Calculators

Jockey Bra Size Calculator M&S Bra Size Calculator UK M&S Bra Size Calculator USA Shyaway Bra Size Calculator Victoria’s Secret Bra Size Calculator USA Victoria’s Secret Bra Size Calculator India Zivame Bra Size Calculator India The Best Bra Size Calculator Accurate Bra Size Calculator First Bra Size Calculator Bra Size Calculator by Picture US Bra Size Calculator Accurate Bra Size Calculator USA Bra Size Calculator UK Bra Cup Size Calculator Bra Size Calculator in Inches Bra Size Calculator for Plus Size Sports Bras Size Calculator Maternity Bras Size Calculator How to Find Your Sports Bra Size

FAQ – Frequently Asked Questions

Find your current bra size and refer to the sister size chart to find sizes that would give you the same cup volume but a different band size.

Sister sizes can give you the same cup volume, but it’s essential to try on the bras to ensure they fit comfortably and provide adequate support.

While sister sizes offer similar cup volume, the band size will be different. Always try on the sister size to ensure it’s the best fit for your body.

Yes, you can switch to a sister size if your regular size feels uncomfortable. It’s especially helpful when shopping in different brands or styles.