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

We all have more than one bra size — here are yours

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

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

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

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

SIZING

My bra isn't fitting right. It is wireless, and a 34B. The center isn't flat on my chest, and the back rides up slightly, but I spill out of a 32B. What

Lace Push Up Bra For Small Busts Lace Lift Up Bra Black – Pepper