Craig,
I think I am a poster boy for Arrow!
I remember dress shoe was the question. However, I have worn them with thick socks and thin socks. Somehow they still fit! I was shocked. Also, I have found that I can not wear cotton socks with them. For some reason, they bunch on the top of my foot where the laces are. That hurts me. When I where smartwool socks in any thickness, that goes away.
Like Billy said, the leather is thick. it is supple however. I think I am walking on a half inch of leather. I was wearing them in the city and could feel every crack on the sidewalk and every bump in the ramps at corners. It was proof that I should feel every stick under my feet as I slink through the woods while hunting.
Billy is also right that you should call Paul at Arrow. He will ask you the right questions to get you what you want the first time.
Martin