Not good photos, but I was limited to either taking pictures through the wire or juggling the camera while trying to prevent escapes. Still, I think that these photos of 18-week-old Blue Australorp cockerels (who are still *slightly* smaller than adult hens of their breed), make a good illustration of how the usual space guidelines look by comparison to actual birds.
This space is 4x8 -- coop enough for 8 or run enough for 3.
This space is 4x8 -- coop enough for 8 or run enough for 3.