Just a warning though, they fit very snug so if you are often between sizes, go for the next 1/2 size up.

Edit on 2/25/13:  I've had the boots now for a couple of months and wanted to give an update.  I really really wanted to love these boots.  I bought them for an upcoming trip to Scotland where I'll be walking alot and there is a lot of rain.  I've been wearing the boots to wear them in before the trip and each time I think it will get better, it just doesn't.  I wear a size US 6.5 and that's the size I ordered.  I have very slim ankles and calves so they aren't tight there but around the top of the foot and toe area they feel too tight.  They fit like a glove and haven't seemed to stretch at all.  Yesterday I wore them for only 4 hours without a lot walking and by the 5th hour I had to take them off to let my feet rest.  I'm afraid at this point to take them with me on vacation so I'm now on the hunt for more boots.  Sadly these just aren't working for me.