A 28DD is small. VERY small. Its sister sizes are 30C and 32A. A 42DD is massive. The cup is relative to the band size.
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Everything You Need to Know About Bra Sister Sizes - The Melon Bra
Sister size, Bustyresources Wiki
What bra size should I try next, I am currently a 42b but the cup wrinkles and is cutting into my sides? - Quora
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A 28DD is small. VERY small. Its sister sizes are 30C and 32A. A 42DD is
What bra size is equivalent to a 28C? - Quora
Everything You Need to Know About Bra Sister Sizes - The Melon Bra
Sister Sizes: The Bra Secret Every Person Should Know – Sister Sizes & Equivalent Bra Size Chart – ThirdLove
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