Sep 2, 2024 · Bra sizes have two components: a band size, which is a number, and a cup size, which is a letter. The band size is the measurement around your underbust in inches. The difference between your bust measurement and your underbust determines the cup size.

Large breast sizes fall under I, J, K, and L cups. Women who get breast augmentation or medical conditions can have M to Z breast sizes. These letters signify your bra cup size, whereas the numbers refer to the bra band sizes.

A Z cup bra size is typically reserved for individuals with an extremely large bust size. In fact, a size Z is the highest cup size available, meaning that it is rare and often customized for the wearer.

Sep 15, 2016 · Bra sizes basically depend on the band sizes and cup sizes of the particular bras, usually consists of numbers and alphabets. In 1932, bra cup sizes were invented and band sizes became popular only in 1940s. All the women differ from each other in shape, size, spacing, position, symmetry and firmness.

The size of a bra always depends on two factors: the circumference of the body just below the breasts (called band size) and the circumference above the breasts, usually at the level of the nipples (called bust size).

Find your local bra size in the Bra Size Conversion Chart below, and see equivalent bra sizes in other bra sizing systems (countries). Note about cup size: In this bra size conversion chart, all bra sizes start with cup size AA. This will work with most bra models.

Let's take a look at what the numbers and letters of bra sizes mean and how this all came to be. We'll also explain how to measure bra size for a better fit.

Together, these should guide you to a size that provides optimal support and comfort, while ensuring a great fit without any spillage or gapes. Determining a woman’s ideal bra size requires a combination of three separate measurements — the bust, the under-bust and the cup.

ThirdLove offers over 60 bra sizes from 32 to 44 band and bra cup sizes from AA to H cup, including our exclusive half cup sizes. Using your current bra size as a starting point, you can refer to the bra cup size chart below to refine your fit.

Mar 8, 2025 · Understanding your Z bra cup size is essential for finding the perfect fit, especially when it comes to comfort and support. In 2025, there are numerous options available that cater to various styles and preferences.