Measure Your Shoe Size Shoe sizing is based on the length and width of your foot. Determining your proper shoe size is essential to a comfortable fit. Fit Tips * Shoes that are too small are one of the major causes of foot pain and problems. * Shoes that are too large can cause blistering and a lack of stability. * Do not assume your shoe size is the same as it always has been. The shape of your feet changes over time. * Not all brands of footwear fit the same. The below generic size guide is a good indicator on what shoe size you should wear, but some brands may offer slightly different sizing guidelines. Measurement Tips * Take your measurements at the end of the day, when your feet are the largest. * Wear the socks you will wear with your new shoes when you measure. * Measure both feet and fit shoes to the larger foot. * If you are doing the measurement by yourself, you will get more accurate results if you sit in a chair when measuring. Do not stand. * If you have someo...