You may have heard the saying “boobs are sisters rather than twins” meaning that our boobs are rarely identical, but did you know that ‘the girls’ can have sister sizes, too?

Pretty cool right, but what does sister bra size mean exactly? In other words, sister bra sizes are all the equivalent bra sizes that will fit ‘one size’ of boobs.There are times when the bra size you regularly opt for doesn’t fit you. Ever wondered why you face this situation in spite of buying the bra size you’ve bought a million times before? Well, remember that several factors, such as the bra fabric, manufacturing variations, presence of underwires, cup shapes, and padding levels, might contribute to the way a bra fits you. This is where the concept of sister size comes into play.

Sister sizes can be useful when tweaking the fit of your bra and if you’re struggling to find the size that you need in a bra that you love.Sister sizes can be a savior when the bra in your actual size doesn’t fit properly. In simple terms, sister sizes are equivalent bra sizes. The cup volume of your actual bra size and sister size bra remains the same. That’s why fitting experts recommend trying sister sizes when your original bra size doesn’t fit or is unavailable.