I found a website that said your waist is halfway between your bottom rib and the top of your hip. That was pretty close to my belly button. Got anywhere from 34" to 36" using a metal measuring tape, which could have been part of the issue. But 6’2" with 34" waist should be considered thin, right?
I’ve always been able to vote within 10 min or less. Must vary a lot by location.