Finding the perfect bra size can be tricky, but don’t worry—if your size isn’t available or doesn’t feel quite right, there’s a simple solution! You can try an alternate size (often called a sister size) that offers the same cup volume with a different band size. 

How Sister Sizes Work:

  • If the band is too tight but the cup fits, go up one band size and down one cup size.
  • If the band is too loose but the cup fits, go down one band size and up one cup size.

Sister Size Chart Example:

Here’s an example of how sister sizes work for different band sizes.

Let’s take a size 36C. Incase 36C size is not available, your equivalent or alternate sizes would be:

  • Sister size 1 would be 38B (up one band size, down one cup size).
  • Sister size 2 would be 34D (down one band size, up one cup size).

You can select any of the two Sister Size options incase your Original Size is not available. 

Look at the Sister Size Chart examples below to find equivalent sizes for you: