What Are Bra Sizes? What is the Alphabet (ABCD) in Bra Size?
When shopping for a bra, one of the first things you’ll encounter is the term bra size But what exactly does this mean, and what is the significance of the letters like A, B, C, D, and so on? In this blog, we will break down the concept of bra sizing, explain how to measure yourself for a perfect fit and demystify the alphabet (ABCD) system used in bra sizes.
Understanding Bra Sizes: A Combination of Numbers and Letters
Bra sizes are typically made up of two parts: a number and a letter. For example, a common bra size is 34B. This size can be broken down into two components:
The Number (Band Size): This refers to the measurement around your ribcage, just under your bust. It represents the band that goes around the torso to support the breasts. Band sizes generally range from 28 to 46 inches, though they may extend beyond that depending on the brand.
The Letter (Cup Size): The letter corresponds to the volume or size of the cup that holds the breast. The cup size is determined by the difference between your band size (the number) and the measurement around the fullest part of your bust.
Band Size (The Number): To determine your band size, measure around your ribcage, just below your bust. The measurement is then rounded to the nearest whole number, which is your band size.
For example, if your ribcage measures 31 inches, your band size would likely be 32 (rounding up to the next whole number).
Cup Size (The Letter): Cup size is based on the difference between your band size and the fullest part of your bust. The larger the difference, the larger the cup size.
If the difference between your band measurement and bust measurement is 1 inch, you would typically wear an A cup.
A 2-inch difference corresponds to a B cup, 3 inches to a C cup, and so on.
For example, if your band size is 32 inches and your bust measures 34 inches, you would likely wear a 32B, because the difference is 2 inches.
The Alphabet (ABCD) System: What Do the Letters Mean?
Now that we understand the two components of a bra size (band and cup size), let’s dive deeper into what the alphabet (A, B, C, D) actually signifies.
A Cup: The Smallest Cup Size
A cup typically indicates a small bust. If there is a 1-inch difference between the band and bust measurements, the cup is classified as A.
A cup is generally for women with a less pronounced bust, although this is not always the case. Everybody is different, and people of all shapes and sizes can wear any cup size.
B Cup: Slightly Larger
B cup indicates a medium bust size, where the difference between the band and bust measurement is about 2 inches.
This is one of the most common cup sizes, offering a more average fit for many women.
C Cup: More Fullness
C cup refers to a fuller bust, with a 3-inch difference between the band and bust measurements.
C cups provide a more rounded look and offer moderate support while still maintaining a natural shape.
D Cup: Full Bust
D cup is typically for women with a larger bust. This cup size is for those with a 4-inch difference between their band and bust measurements.
Many women who wear a D cup find that they need extra support in terms of the band and strap design, so choosing a well-designed bra is crucial for comfort.
Beyond D: DD, DDD, and Larger
After D, bra cup sizes continue to increase with double and triple D options (DD, DDD, etc.).
DD and DDD (also known as E and F in some sizing systems) represent even fuller cups, with increasing differences between the band and bust measurements.
Cup sizes beyond D are not standardized across brands, so it’s important to check the sizing chart of each specific brand to understand how they label larger cup sizes.
What About Smaller Sizes?
In addition to A, B, C, and D, there are also AA (smaller than A), and AAA (smaller than AA) cup sizes, but these are less common.
How to Measure for the Perfect Bra Size
To ensure the best fit, measuring yourself correctly is essential. Here's a step-by-step guide to help you determine your ideal bra size at home:
Step 1: Measure Your Band Size
Use a soft measuring tape to measure around your ribcage just under your bust. Make sure the tape is snug but not tight.
Round to the nearest whole number. If your measurement is odd, add 4 inches; if even, add 5 inches.
For example, if your ribcage measurement is 31 inches, you would add 5 inches, making your band size 36.
Step 2: Measure Your Bust Size
Measure around the fullest part of your bust while keeping the tape comfortably snug.
Ensure the measuring tape is parallel to the ground and sits flat against your back.
Round your bust measurement to the nearest inch.
Step 3: Calculate Your Cup Size
Subtract your band measurement (Step 1) from your bust measurement (Step 2).
For example, if your band size is 36 inches and your bust measurement is 38 inches, the difference is 2 inches, which corresponds to a B cup.
Step 4: Determine Your Bra Size
Combine your band size with your cup size. In this example, it would be a 36B.
Conclusion: Choosing the Right Bra Size
Bra sizes are a combination of numbers (band size) and letters (cup size), with the letter system indicating the volume of the breast. Understanding this system is the key to finding a bra that fits properly and comfortably. Remember, though, that bra sizing can vary slightly between brands, so it's always a good idea to try on a few styles or refer to the specific brand’s size chart.
Taking the time to find your correct bra size can make a significant difference in how comfortable and confident you feel throughout the day. Whether you’re looking for everyday comfort or a special occasion bra, knowing your proper size is the first step to achieving a better fit and better support.
