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

How to Measure Your Bra Size: Chart and Calculator

How to measure a woman's body for clothes - Quora

What cup size would I be if I am a 32D/34C? I want to buy 'strapless bras' but the sizes are only for cup size, not band. - Quora

Finally, Bra Sizes Explained – Understanding How Bra And Cup Sizes

ThirdLove Bra Size Chart - Find The Perfect Bra For Your Cup Size

Warning Signs Your Bra Is The Wrong Size

What is the meaning of the measurement (36-90) written on a bra? - Quora

Bra Fitting Checklist! Do YOU Know If Your Bra Fits? – Bra

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