What Are Letter and Numbers for Bra Cups?

The band size, represented by the number, is determined by measuring the circumference of your rib cage. This measurement forms the foundation of your bra, ensuring it stays in place and offers the necessary support. On the other hand, the cup size, denoted by a letter, is determined by assessing the difference between your rib cage and bust measurements. This measurement accounts for the volume of your breasts and is essential for a seamless and comfortable fit. Together, the number and letter create your bra size, which serves as a guide for selecting the ideal lingerie that meets your individual needs and preferences. Therefore, understanding and finding the correct bra size is key in ensuring optimal comfort, support, and confidence throughout the day.

What Does B or C Mean in Bras?

When it comes to the world of bras, it’s important to understand what the letters B and C mean in terms of sizing. Bra sizes typically consist of two components: a band size represented by an even number such as 32, 34, 36, and so on, and a letter indicating the cup size, which can range from A to Z.

In relation to cup size, the letter B generally refers to a moderate amount of breast tissue. This means that if you wear a bra size with a B cup, your breasts will likely have a more average or medium size. B cups are designed to accommodate breasts that are slightly fuller and may require a bit more support and coverage.

It’s important to note that cup sizes aren’t absolute and can vary based on individual body types and breast shapes. These sizes are just a general guideline to help women find a bra that fits comfortably and provides the right amount of support. It’s always recommended to get professionally measured and try on different bras to find the perfect fit for your specific needs.

In addition to the letter, the band size plays a crucial role in finding a well-fitting bra. The even number in a bra size represents the band size, which indicates the measurement around your ribcage just below your breasts. The band provides the primary support for the breasts, so it’s essential to find the right band size to ensure a comfortable and supportive fit.

Remember that finding the perfect bra is a personal journey, and it may take some trial and error to discover the ideal combination of band and cup size that offers both comfort and support for your individual breast shape.

How to Measure Your Bra Size Accurately

To accurately measure your bra size, you can follow these steps. First, wear a non-padded bra and stand in front of a mirror. Take a measuring tape and measure around your rib cage, just underneath your breasts. Record this measurement in inches. Next, measure around the fullest part of your bust. Make sure the measuring tape is parallel to the ground and not too tight. Record this measurement as well. To calculate your bra size, subtract the first measurement from the second measurement. Each inch difference corresponds to a cup size (e.g., 1 inch is an A cup, 2 inches is a B cup, and so on). Finally, consider the band size by checking the difference between your rib cage measurement and a standard bra size chart. This will help you find the perfect fit. Remember, these measurements are a starting point, and it may be helpful to try on different sizes and styles to find the most comfortable and flattering bra for you.


In conclusion, the numeric and alphabetic elements in bra sizing serve as integral components in determining the perfect fit and support for every individual. This combination forms their unique bra size, allowing them to discover a comfortable, seamless fit that provides the necessary support.