If you have narrow feet: "If you can't [buy narrow shoes], never fall for the trap of the sale associate who suggests buying it a half-size smaller to make up for the fact that you need a narrow width. What will happen in that case is you'll get the width to fit, because a half size smaller is pretty similar to the narrow width of the half size bigger, but you won't get the length and then your toes will be cramped and jammed. The best thing to do is to buy the medium width and [use your own] foam inner soles, which you can put inside the shoe to take up a little of the extra width that the medium has over the narrow. If you do it right, you might even have a more comfortable shoe because you have more padding. Try to always put that padding underneath the lining that your foot sits on.