What is the sister bra size to a 42GG? - Quora

Answer (1 of 3): The sister bra size to a 42GG would be a 44G or a 40H. The sister size of a bra refers to a different band size with the same cup volume. So, going up a band size from 42 to 44 would require going down a cup size from GG to G, or going down a band size to 40 and up a cup size to H.

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