TevaMen's Katavi 2

These are only listed as width "b" which i believe is narrow for men. if anyone purchased them in "b" - do they actually fit narrow?

How do the sizes run? True to size, bigger or smaller?

Do most people wear these without socks? I'm looking for the coolest option this summer (in FL).

If you wear half sizes would it be better to go larger or smaller on the size?