Sister Sizing is an alternate bra size. Simular but not the same

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People are learning their real bra sizes thanks to a calculator that's gone viral on TikTok

Sister Sizes

People are learning their real bra sizes thanks to a calculator that's gone viral on TikTok

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Bras lasenza Push Up 34B- (sister size 32C) RM60, Women's Fashion, Activewear on Carousell