I wear a 12.5, one of the half sizes that is difficult to find.  These fit perfectly and were comfortable from the first day they arrived. I walk on gravel daily at work and needed a trailer runner to avoid tracking rocks into the office. Some shoes claiming to be trail runners will pick up rocks and mud in the tread, these have the proper tread design to avoid picking up debris. They have a little extra support towards the outside of the foot that might not be for everyone, but is what I needed.