What is sister sizing? – SHEER

Ever tried on a bra, where the bra cup fit perfectly, but the band was loose? But then when you went down a band size, whilst keeping your cup size, the cup started to feel tight & then the underwires started to dig in, making the new bra size seemed even more uncomfortable? Well, that's when you find your sister size! Watch now to discover the secret to finding the perfect fit.

Sister size, Bustyresources Wiki

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What is sister sizing? – SHEER

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