Introduction
The device has a simple structure and can be used to measure shoe size. Insert the flat steel into the shoe and push it to the toes. The cursor then moves along the scale until the crank rod touches the heel. Move the device vertically and place the crank bar at the maximum curvature point of the heel to obtain the maximum length. At this point, the shoe code can be read from the scale. There are four types of internal shoe measuring devices, including 11-14 yards for adults and 3-7 yards for children.
