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

How to know your bra size without a measuring tape – Playful

The No BS Guide to Finding Your Bra Size

Why are there so many different bra sizes? How does one know which one they need? - 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

What is a plunge bra? - Quora

How to Measure Your Bra Size: Bra Size Charts, Band and Cup

What does it mean when a bra band is loose? Does it mean the cup size is smaller? - Quora

I am using 34 size bra, bit confused with A, B and C size bra guide me which size will be bigger in B, C and D? - Quora

Is a 32 D a good bra size? - Quora

How To Measure Your Bra Size At Home For A Perfect Fit

Bra Sister Sizes To The Rescue - Sisterhood Of Bras