I found that the Ariat Cruiser runs a bit large.  I normally wear a 9.5...UGG boots for example...but I had to send the 9.5's back for a 9 and they fit perfectly.  So in other words, I recommend getting a half size down from your regular size.  I haven't worn them out of the house yet but I can already tell they are going to be a great light-weight, casual shoe!  I'm even considering getting another pair with a different design!