What are band sizes on bras, e.g. 32B? I don't get the band sizes

What is my bra size? My underbust is 28 inches and bust is 32 inches. I was previously recommended a 28D, but the band was too tight, so it didn't fit. - Quora

MEET OUR NEW BAND/CUP SPORTS BRAS – OISELLE

How to help her to find a perfect fit? Her band is too tight and

Why does the band size fit 34 but the cup size is small DD? - Quora

Sister Sizes: The Bra Secret Every Person Should Know – Sister Sizes & Equivalent Bra Size Chart – ThirdLove

Understanding Bra Sister Sizes

What does it indicate if the bra band constantly rides up at the

Why does the band size fit 34 but the cup size is small DD? - Quora

Cup Bra Size Chart In CM & Inches

What are band sizes on bras, e.g. 32B? I don't get the band sizes

How do bra measurements and sizes work? This makes no sense to me

Sister Sizes, Bra Fit Guide & Size Charts

The Complicated World of Bra sizes