Shop in the afternoon or evening since feet tend to widen throughout the day, according to the National Institutes of Health. Shoes that fit well in the morning might feel too tight several hours later.
Wear your running socks and bring your orthotics, making sure sneakers work well with both.
Try on several pairs of shoes, giving each one a test run by jogging around the store.
Finally, make sure the sneakers you pick don’t fit too snugly–too-tight shoes can lead to lost or black toenails.