The measurements below are inside measurements from the heel to the toe of the shoe, EXCEPT for pointy-toed styles, which are measured from the back of the heel to the inner tip of the shoe.
 
For pointy styles, marked with a '*': Measurements for pointy-toed shoes are longer than regular and open-toed styles, because we measure all the way to the innermost tip of the shoe. This means that the measurements WILL be longer than your foot. You must take this into account when deciding on a size. Measure as you would for a regular shoe but give allowance for the point. 

For regular and open-toed styles: To measure your foot, simply place a ruler on the floor, and measure your foot from heel to big toe. On open-toed and sandal styles, measurements are taken from heel to tip of the insock's foot pad.