To measure the shoe Place the measuring tape against the heel cap and hold it in place. Push down the tape measure until it touches the front edge of the shoe, where the shoe is the longest. The tape measure should lie flat on the shoe’s insole for the numbers to be as valid as possible.Click to see full answer. Keeping this in consideration, how do you measure the bottom of a shoe?Put the shoe on a flat surface. Place the end of the tape measure perpendicular to the edge of heel and measure until it reaches the top edge of shoe. ?Measurement including shoe sole.Also Know, what is the insole of a shoe? The insole is the inside part of the shoe that runs underneath and supports the bottom of the foot. Insoles are also referred to as footbeds and inner soles. They are usually easily removed. Keeping this in consideration, how do you measure inner footbed? Using a flexible tape measure or a ribbon that you can mark on. Push the end that is marked with the 0 right into the tip of the toe on the inside of your shoe. Laying the tape flat, walk it all the way to the inside of the heel, laying it flat against the bottom of the shoe. This measurement is your true insole length.What is insole size?These measurements are a also a key factor when shopping for off-the-shelf orthopaedic insoles. Your numerical shoe size, whether it be in a US, UK or French size is based on the length of your foot, it is measured from the heel to the tip of the longest toe.