as the lifelong uncontested regional vice president of the itty bitty titty committee, it is totally worthwhile to look into different methods of measuring bras and totally worthwhile to test out those findings by trying on bras from various retailers in various sizes to see what is comfortable for YOU because there is no one correct way to measure bras and sizing, elasticity, cup shape, etc. are inconsistent between brands and lines.

I 100% know how to "correctly" measure my bra size, but it's not helpful information when band size + cup size doesn't account for where on your chest your tits are set and *even given* correct measuring it's nearly impossible to find the band/cup combo for you *and* adding spacers to the band changes where the cups are set *and* there's probably a disparity between the boobs because there usually is and it's not a big deal your boobs are fine it is the bras that are wrong.

If you're using all sorts of measuring guides and are still having trouble finding bras that fit you the way you want them to, I know it's frustrating and I want to say that A) you are most likely not doing it wrong there is literally no single method that works for everyone B) mass manufactured clothing is just not made to fit every body type and you are probably correct and it is legitimately hard to find something that works (for which I'm sorry, I hope you hit upon a good solution. mine is sports bras with no cups and tank tops with built-in shelf bras).