Why are 34C and 32D sister sizes but 32D fits me well and 34C is

Answer (1 of 4): Well, I don't know how this sister sizes ( in relation like sister companies etc,,) ever became as you describe..There is nothing remotely close to each of those sizes. Mathematically and according to any standardized charts ..Remember one very important rule in life .Mathematics

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How come I can fit both on a 36C and a 36D bra size? - Quora

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How come I can fit both on a 36C and a 36D bra size? - Quora