Foot Size: Measured from the back of the heel to the tip of the longest toe.
Shaft Length: Measured from the base of the heel, up the back of the calf, to the top of the boot.
Circumference: Measured at the fullest part of the shaft.
Heel Height: Measured from the sole of the heel to the floor.
Platform Height: Measured from the sole (at the ball of the foot) to the floor.