It’s so bad that my fiancée has some bras that say she’s a B cup and others that says she’s a D cup. In order to go bra shopping, you have to actually try them on to find out if they fit.
If I had to try on underwear to see if they fit, I might not bother with underwear at all!
I’m both fat and tall. None of my fucking clothes have consistent sizes that fit. I’m not the least bit surprised that the clothing industry’s greatest minds were defeated by breasts.