It was difficult to hold two rulers and a camera so I took a pic of how I held the one ruler and then just measured the rest of the wheels.
The correct way to do this is to remove the springs and jack up the suspension until simulates full compression. I held the one ruler like this, flush to the inside top of the fender lip to extend the fender down next to the tire. Then I measured the distance from the top of the tire sidewall to the outside edge of ruler #1.
Distance from tire sidewall to fender edge:
Front: 19mm
Rear: 9mm
Notes: My fenders are rolled front and rear. I only rolled them and not pulled.