Bra Size Guide – Chart & Calculator

Bra Size Guide

Discovering and updating your bra size without the assistance of a bra-size calculator can be a tedious and frustrating task. There are numerous methods to get fitted for a bra, but it’s crucial to continually monitor your size. Our bodies undergo rapid changes, and wearing an ill-fitting bra can have detrimental effects on breast tissue.

While I always advocate for professional fittings, it’s also beneficial to be able to determine your own bra size at home. This ensures you stay informed, especially during busy periods when visiting a lingerie department might not be feasible every six months.

One of the initial revelations you’ll likely have is realizing you’ve been wearing the incorrect bra size for an extended period. However, this is a common mistake, particularly the misconception about back size.

A bra-size calculator offers a convenient solution for everyone to ascertain their correct size without needing to visit a physical store. Read on for my step-by-step guide on finding your accurate bra size.

How to Measure Your Bra Size at Home

How to Measure Bra Size in cm or in inches

Start by measuring around the band part of your bust, directly underneath your breasts, using a soft tape measure. Ensure it lays flat against your skin and record the measurement in inches.

Next, measure the fullest part of your bust using the tape measure, also in inches.

To determine your cup size, subtract your band size from your bust size. The difference corresponds to your cup size: less than 1 is AA, 1 is A, 2 is B, 3 is C, 4 is D, 5 is DD, and so forth.

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Remember to use your band measurement to provide the numerical component preceding the cup letter. For instance, if your band size is 34 and your bust size is 37, your bra size would be 34C (a difference of 3 indicates a C cup).

It’s important to note that bras may fit differently depending on the brand. However, armed with these fundamental techniques, you’ll be equipped to determine your correct size.

Bra Size Chart

Band SizeUnderbust (inches)Underbust (cm)Cup SizeBust (inches)Bust (cm)

Bra Fitting Guide

How to Measure Bra Size at Home

Under-band: Ensure it sits parallel to the floor and is snug enough that only two fingers can fit under the elastic.

Center front: Should lie flat against the sternum.

Side wire: Check that it rests flat against the rib cage without digging into breast tissue.

Cup capacity: The cup should be able to hold the breasts completely without spilling.

Straps: Adjust them so that only two fingers can fit on top of each other under the strap, providing the right pressure for your shoulders.

Bra Size Calculator

This tool calculates bra size using bust and band measurements. For precise results, measure to the nearest ¼ inch.

It offers sizing for various regions including the United States, United Kingdom, European Union, France, Belgium, Spain, Australia, and New Zealand.

Bra Size Calculator

Bust size refers to the loose circumference around the chest at the fullest part of the breasts, measured while standing straight with arms to the side, and wearing a well-fitted bra.

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Band size is the snug circumference measured directly underneath the breasts, ensuring a firm fit without being too tight.

Types of Bras Style

Bras are not just undergarments; they are essential pieces of clothing that serve both functional and aesthetic purposes. From providing support and comfort to enhancing confidence and style, bras come in a wide array of styles to cater to different body types, preferences, and occasions. In this guide, we’ll delve into the various types of bras, their unique features, and when to wear them.

  1. T-Shirt Bras:
    • Designed for everyday wear under fitted tops.
    • Seamless cups for a smooth look.
    • Offers full coverage and subtle shaping.
    • Ideal for wearing under t-shirts, blouses, and form-fitting clothing.
  2. Push-Up Bras:
    • Features padded cups that push the breasts upward and closer together.
    • Enhances cleavage and provides lift.
    • Perfect for low-cut tops and dresses.
    • Boosts confidence and creates a flattering silhouette.
  3. Sports Bras:
    • Engineered to minimize breast movement during physical activity.
    • Offers maximum support and comfort.
    • Available in compression and encapsulation styles.
    • Essential for workouts, sports, and high-impact activities.
  4. Strapless Bras:
    • Designed without straps to wear under off-the-shoulder or strapless garments.
    • Features silicone or grip strips to prevent slipping.
    • Provides support and lift without visible straps.
    • Ideal for formal events, cocktail dresses, and summer tops.
  5. Bralettes:
    • Soft, lightweight, and wire-free alternative to traditional bras.
    • Offers minimal support and coverage.
    • Often adorned with lace or decorative details.
    • Perfect for lounging, layering, and adding a touch of femininity to outfits.
  6. Balconette Bras:
    • Features low-cut cups with wide-set straps.
    • Lifts and enhances the bust, creating a rounded shape.
    • Provides moderate coverage with a sexy, vintage-inspired look.
    • Ideal for wearing with square-neck tops, scoop-neck dresses, and lower-cut necklines.
  7. Demi Bras:
    • Half-cup style that covers half to three-quarters of the breasts.
    • Offers less coverage and more cleavage than full-coverage bras.
    • Creates a natural, lifted look.
    • Perfect for wearing with low-cut tops and dresses.
  8. Nursing Bras:
    • Designed for breastfeeding mothers.
    • Features convenient nursing clips or panels for easy access.
    • Provides support and comfort during nursing.
    • Available in various styles, including wire-free and underwire options.
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Bra Fitting Guide

Understanding the different types of bras and their unique characteristics is essential for building a well-rounded lingerie wardrobe. Whether you’re looking for everyday comfort, special occasion support, or workout essentials, there’s a bra style to suit every need and preference. By exploring the diverse world of bras, you can discover the perfect fit for your body, style, and lifestyle.


  • Gloria

    Gloria is a top-performing fashion designer with more than eight years of experience in developing fashion concepts.

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