MEASURING YOUR FEET
Wear the type of socks you'll wear with your shoes and measure feet in the afternoon, ensure your foot is flat before measuring.
Stand up straight on a hard surface with your heel against the wall and a piece of blank paper taped to the floor, flush against the wall beneath your foot.
Have someone mark the longest part of your foot (referred to as heel-to-toe length) on the paper with a pen or pencil, or measure yourself if necessary.
Use a ruler to measure the heel-to-toe length you marked for each foot.