By: Courtney Rappold
Bra shopping involves a lot of trial and error, even if you know your correct bra size. Not every bra you try on in that size will be a proper fit and chances are you will need to try on a bunch of bras until you find "the one". Your "regular bra size" is more of a guide to helping you find the perfect fit.
This is when bra sister sizing comes into play, but what exactly is sister sizing? Sister bra sizing is an alternate bra size with the closest cup volume to your regular bra size in the next band size up or down. For example the same exact cup size is used to make 38B, 36C, 34D, AND 32DD bras, making them all sister sizes!
From time to time, you probably have noticed different brands and styles of bras fit you differently despite having the same cup letter and band number on the tag. Even the fabric type and construction of the bra play a huge role in whether it fits or not. Because every lingerie brand uses their own measuring systems, you may need to size up or down in the band or cup (using sister sizing) to get the right fit.