I am a size 8 and bought the size 8 and they are just a little bit roomy. You definitely do not need to size up for these and they are not narrow. The first time I wore these for a few hours and was walking a lot and I got a blister so yes they do take a while to break in but just wear double socks to prevent blisters. Overall they are very stylish and I have gotten many compliments on them.
I just love everything about this boots...the price, the color...and also they fit perfectly.Very comfortable! i live in WA so they are good for the rain.