The letters in bra sizes represent the cup size, and the numbers represent the band size. The cup size is determined by taking the difference between your bust measurement and your underbust measurement. Each inch of difference corresponds to a letter, with A representing 1 inch, B representing 2 inches, C representing 3 inches, and so on. Band size refers to the measurement around your ribcage just below your bust. It is important to consider both band and cup size when selecting a bra for optimal fit and support.
A common misconception is that all bras with the same cup size will fit the same way across different brands or styles, but this is not true. Different brands may have slightly different sizing standards, so it’s important to try on bras from different brands to find the best fit for you. Certain styles of bras may run larger or smaller than others even within the same brand due to differences in design.
A less-known fact about bra sizes is that sister sizes exist – these are sizes that have the same cup volume but different band sizes. For example, if you typically wear a 34C, but find that it’s too tight around your ribcage, trying a 36B may provide a more comfortable fit while maintaining the same cup volume.
Now that you understand what each letter and number in bra sizes mean, I recommend getting professionally measured at least once a year as factors like weight fluctuations can affect your bra size over time. Having an accurate understanding of your measurements will help ensure you’re wearing properly fitting bras for ultimate comfort and support.
| Band Size | Cup Size | Description |
|---|---|---|
| 28 | A | Band size is 28 inches, cup size is small |
| 30 | B | Band size is 30 inches, cup size is average |
| 32 | C | Band size is 32 inches, cup size is slightly larger |
| 34 | D | Band size is 34 inches, cup size is larger |
| 36 | DD | Band size is 36 inches, cup size is even larger |
| 38 | E | Band size is 38 inches, cup size is extra large |
| 40 | F | Band size is 40 inches, cup size is very large |
| 42 | FF | Band size is 42 inches, cup size is extremely large |
| 44 | G | Band size is 44 inches, cup size is gigantic |
| 46 | GG | Band size is 46 inches, cup size is colossal |