Bra Size Calculator

Category: Other Health
- May 22, 2025
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Find your perfect bra size with this calculator. Accurate measurements lead to better comfort and support. For best results, measure while wearing a non-padded bra or no bra.

Measurement System

Your Measurements

Band Size Measurement Full Bust Measurement Measure directly under bust, keeping tape snug and level Measure around the fullest part of your bust Tips for Accurate Measurements: • Stand straight with arms relaxed at sides • Keep measuring tape parallel to the floor
How to Take Accurate Measurements
  1. Wear a non-padded bra or no bra for the most accurate measurements.
  2. Band/Underbust: Measure directly under your bust where a bra band would sit. Keep the tape measure snug and parallel to the ground.
  3. Full Bust: Measure around the fullest part of your bust (typically at nipple level). Keep the tape measure parallel to the ground.
  4. Stand straight with your arms relaxed at your sides during both measurements.
  5. Take each measurement twice to confirm accuracy.
inches
Measure directly under your bust, making sure the tape measure is snug and level all the way around.
inches
Measure around the fullest part of your bust, keeping the tape measure parallel to the floor.

Additional Factors

Fitting Preferences

Advanced Options

Understanding Bra Sizing

Bra sizes consist of a band size (number) and a cup size (letter). The band size indicates the measurement around your ribcage, while the cup size represents the difference between your band and bust measurements.

How Bra Sizing Works

Bra sizing varies by region, but generally follows these principles:

  • Band Size: Usually derived from your underbust measurement, possibly with some adjustment.
  • Cup Size: Calculated from the difference between your full bust and band measurements.
Sister Sizes

Sister sizes have the same cup volume but different band sizes. For example, 34C, A 32D, and 36B are all sister sizes. This is useful when you need to adjust the band size without changing the cup volume.

International Sizing

Different countries use different sizing systems:

  • US/UK: Uses inches for measurements and cup sizes AA, A, B, C, D, DD, etc.
  • EU: Uses centimeters and cup sizes A, B, C, D, E, F, etc.
  • France: Similar to EU but with different cup progressions.
  • Italy: Uses numbers for both band and cup (e.g., 1, 2, 3, 4).
Signs of a Good Fit

A properly fitting bra should have the following characteristics:

  • The band sits parallel to the floor and feels snug but not tight.
  • The center gore (the part between the cups) sits flat against your sternum.
  • The cups fully contain your breast tissue without any spillage or gaps.
  • The straps don't dig into your shoulders or fall down.
  • The wire (if present) sits at the base of your breast and follows your natural contour.
Measuring Tips
  • Measure yourself while wearing a non-padded bra or no bra.
  • Keep the measuring tape parallel to the floor.
  • For the most accurate results, have someone help you measure.
  • Take measurements twice to confirm accuracy.
  • Remember that bra sizing is just a starting point - always try on bras before purchasing.

What is the Bra Size Calculator?

The Bra Size Calculator is a handy tool designed to help you find the perfect bra size for comfort and support. By using accurate measurements, you can discover which bra size fits you best. Not only does this calculator provide results, but it also guides you through the measurement process to ensure you're getting it right.

How to Measure for Your Bra Size

Measuring yourself accurately is key to getting the right bra size. Here’s how to do it:

  • Wear a non-padded bra or no bra at all for the best results.
  • For the underbust measurement, place the tape snugly under your bust.
  • For the full bust measurement, measure around the fullest part of your bust.
  • Stand straight and keep your arms relaxed while measuring.
  • Take each measurement twice to ensure accuracy.

Why Accurate Measurements Matter

Using the Bra Size Calculator with precise measurements can improve your comfort. An ill-fitting bra can cause discomfort, but finding the right size can enhance how you feel throughout the day. Proper sizing ensures that the bra supports your bust well without digging into your skin.

Choosing the Right Measurement System

The calculator allows you to select between different measurement systems. You can choose to measure in inches (common in the US and UK) or in centimeters (commonly used in Europe). Picking the right system based on your location or preference helps ensure that you get the most accurate result possible.

Understanding Band and Cup Sizes

Bra sizes consist of a band size (the number) and a cup size (the letter). The band size indicates your ribcage measurement, while the cup size shows the difference between your bust measurement and your band size. Knowing how these sizes work helps you understand the results the calculator provides.

Additional Factors to Consider

When using the Bra Size Calculator, consider factors like your body frame and breast shape. These details can affect how a bra fits. You can input these preferences to tailor the results even more.

  • Frame types: Average, petite, plus size, or athletic.
  • Breast shapes: Balanced, full on top, full on bottom, and more.

Getting Recommendations and Sister Sizes

The calculator not only gives you a suggested size but also offers sister sizes. Sister sizes are different band sizes that share the same cup volume. For example, if your recommended size isn’t perfect, trying a sister size can be a great option. This feature allows flexibility and helps you find styles that fit better.

Final Thoughts on Finding Your Bra Size

Using the Bra Size Calculator can greatly improve your shopping experience. By taking accurate measurements and understanding your sizing options, you can find bras that fit well and feel amazing. Don't hesitate to revisit the calculator if your body changes or if you try different styles. Finding the right bra is all about getting the perfect fit!