I chose a Keen shoe because I've had them in the past. I have high arches and this size 9 ( my usual size) fit wonderfully even with thicker socks on. I will say that if you do plan on wearing thicker socks, yes it can be a little snug getting them on at first. But being that Keens are known to have a wide toe box and allow your feet to naturally spread when walking, I would recommend them to anyone looking for a good everyday/ walking shoe.  I am anticipating  that since they are leather, they will have some give in time.