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What are Bra Sizes? What is the alphabet (ABCD) in bra size?

What is the alphabet (ABCD) in bra size
Bra Size Calculator

What are Bra Sizes? What is the alphabet (ABCD) in bra size?

When it comes to comfort and confidence, especially when young girls and teens are starting to wear bras, finding the right one can make a world of difference. However, understanding bra sizes with their alphabet letters (ABCD) usually becomes complicated. In the blog, we will simplify various bra sizes for young girls by explaining the ABCD in bra size, how these sizes work and what they represent.

The Importance of Knowing Your Bra Size
Using a bra is not just about getting dressed because it has to provide adequate support as well as being comfortable. A woman must know her correct bra size because ill-fitting ones cause discomfort while good-sized ones can improve your posture and boost your confidence as well. However, all those different types and sizes may be hard to understand. You must first know what the numbers and letters in bra sizes mean if you want to know your true bra size.

What Are Bra Sizes?
Normally, a bra size consists of two components i.e. a number and a letter where the number basically refers to the band size which measures around your ribcage beneath your bust while the letter shows the cup volume of the breast.

For example, in a bra size 34B:
34 stands for band size (the measurement around your ribs).
B indicates cup size (the measurement roundest part of your bust).

What Does ABCD in Bra Size Mean?
The letters A-B-C-D etc., that follow after the number indicate cup size which is determined by the difference between bust measurement from band measurement.

  • A Cup: The bust measurement is about 1 inch larger than the band size.
  • B Cup: The bust measurement is about 2 inches larger than the band size.
  • C Cup: The bust measurement is about 3 inches larger than the band size.
  • D Cup: The bust measurement is about 4 inches larger than the band size.

How to Find Your Bra Size
Let’s go through an example using a real-life situation so that you understand better.

Measure the Band Size: Take a tape measure and wrap it around your ribcage, just under your bust. The tape should not be too tight but just fit enough. Imagine that the measurement is 32 inches.

Measure the Bust Size: Measure across the fullest part of your chest. Make sure that you are level with the tape and it isn’t exceedingly tight or loose. Suppose this measurement is 36 inches.

Calculate the Cup Size: Subtract the band size from the bust measurement which in this case is 36 (bust) – 32 (band) =4 inches

According to the cup size chart;

  • 1 inch = A cup
  • 2 inches = B cup
  • 3 inches = C cup
  • 4 inches = D cup

Therefore, if you have a difference of 4 inches between a band size of 32, then you have a bra size of 32D.

Why Is It Important to Wear the Right Bra Size?
There are several reasons why wearing wrong-sized bras can be harmful:

  • Comfort: Discomfort and pain while wearing bras can be avoided by choosing the correct size.
  • Support: Having good support helps with posture and lessens backaches.
  • Confidence: It enhances one’s appearance making one feel more confident in their shape.
  • Health: This protects against skin irritation as well as damage to breast tissue.
  • Common Mistakes When Choosing a Bra Size
  • Guessing the Size: Avoid guesswork by measuring yourself properly or having someone else do it for you professionally.
  • Ignoring the Band Fit: The band provides most of its support so ensure it fits snugly.
  • Overlooking Comfort: In terms of style, comfort must always be prioritized.

Remember that for teenagers, having a proper bra size means greater comfort, support and confidence.

Teenager Bra: Your Support and Confidence Buddy
At Teenager Bra we believe every girl is unique. That’s why we have a range of different styles and sizes of bras, all made to enhance your comfort and give you maximum support. Whether you are just starting to develop or have blossomed into a fuller figure, we have the right bra that will provide day-long confidence and comfort.

So don’t be shy! Explore our selection of bras and find the perfect fit for your growing body. Teenager Bra is here to help you feel confident and embrace your changing body!


1) What are bra sizes and how are they determined?
Bra sizes are a combination of a number and a letter. The number represents the band size (measurement around the ribcage under the bust), and the letter indicates the cup size (difference between the bust and band measurements). For example, in a 34B bra size, 34 is the band size, and B is the cup size.

2) What is ABCD in bra size?
ABCD in bra size refers to the cup sizes, indicating the volume of the breast. ‘A’ is the smallest cup size, and as the letters progress to ‘B,’ ‘C,’ and ‘D,’ the cup size increases, representing larger breast volumes.

3) What does the D mean in bra size?
In bra size, ‘D’ refers to the cup size, indicating a larger breast volume compared to A, B, and C cup sizes.

4)Why is it important to wear the correct bra size?
Wearing the correct bra size is important for comfort, proper support, and preventing issues like back pain, poor posture, and skin irritation.

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