Sizing OR1 Stiff StepsTM 
Measuring is not a precise science; there are many variables to consider such as:
♦ Boot width
♦ Boot type - padded or thin boots effects size
♦ Amount of use - Nylon will shrink up to 10% after repeated wet/dry conditions
Double check by loosely measuring the circumference at the instep (2 vertical fingers between the laces and the \ measuring tape) and add 1 inch. This additional inch is lost during sewing and the protrusion (left and right) of \ the steel plate in the instep.

 

Again, remember that nylon shrinks 5-10% over the years.

If needed, custom sizes can be made for you.