Ariat paddock boots size question?

I have these exact boots and so does my sister. Both of us needed to go up 1 size from our regular shoe size, because the tend to fit small. As much as you want to them to fit perfectly, it's better for them to be a bit too big, but still be able to wear them, than too small, and have your foot not fit at all. I'd go with an 8 or an 8.5.