I used 6' tall 2x4 wire for the sides and top of my run. Then I put 2' chicken wire around the bottom to keep everything's appendages properly in or out.
got the 8 by 10 run finished all but the tin roof, have a tarp over it for now, my lil cjicks are growing fast and I need more room already, so am adding a 16 by 10 to the 8 by 10 pen,,am using the 2 by 3 inch welded wire from TSC, it costs $109 before taxes, will try to send pics soon,,lol,,then comes the job of building 2 coops