What's the Deal With Shoe Sizes?

I want to know what the deal with shoe sizes is. I looked into this because you've often complained about shoe sizes. It doesn't matter like where I buy my shoes from or what country I'm in, none of them make sense. And they don't go up the amount that you expect them to like a size seven to an eight to a nine isn't like the same amount of distance. So when you ask this question, I was like, Oh, they're numbers. It's some kind of measurement,. I'll look it up. And it's a mess. The UK size add one to get US men'sAdd one to get you a 10 men's is a woman