How To Measure Your Foot: Place your foot on a flat surface with your heel against a straight edge. Place a ruler beside your foot touching the straight edge your heel is also touching, then take the length in millimetres from the tip of your longest toe to your heel. Please be aware that your longest toe may not always be your big toe. Clarks has been in business for over 100 years making very fine men's dress shoes in a variety of styles. Featuring a wide range of top-quality components, Clarks gives you the options you desire in the quality you demand.