Ariat gold and brown boots sz 9

Like new Ariat boots size 9. Gold and turquoise with dark brown leather. These are beautiful with no flaws. The size says 6 but had my sister try on who is a size 9 and these fit her. I’m a solid 8 and they are too big. When you look at the website, their sizing is very different. I’ll add a photo to show the measurements they suggest.