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 have a long torso and broad shoulders, so I have to get xl tall shirts in some brands because most make their standard xl shirts wider but not taller than med and small.
Banana Republic is the shortest length. Hurley is the best length.
Then there’s XXL and 2XL, which aren’t the same size for some bizarre reason