I split the difference between each half. I have a 8 ft. wide by 16 ft. run.The first 8 ft. that connects with the coop is 7 foot tall slanting to 6 foot, then the next 8 ft. of run is only 3 ft. high. THis allows me room to get in and feed , check door, give treats etc. then the smaller area is more within reach than if my whole big run was only 3ft.
Hope this helps.
Hope this helps.