We are just now putting up the run around the new coop. I am using approximately 200 ft of wire (conservative estimate) .... which would be the perimeter. Since it is not an easily defined space... kind of a drunken square .... for easy math I assumed 50 ft per side. That would make 2500 square feet which would mean it has room enough for 250 chickens????? The run just does not look that big to me? I can NOT imagine having 250 chickens in there? We will have about 50-60 plus or minus a few and it looks just adequate for that. Although my 10 hens are going to be pretty upset when they loose free range (over 3 acres) priviledges.