What Size Coop Is Need It For 25 Large Chickens?

A pretty good size one. My uncle has a lot of chickens and he has one that is 15' X 50'. But he also uses half of it as a garden during the summer. In the winter time he opens it all up so that the chickens fertilize and keep the dirt rutted up. In the summer time he closes it back up and he never has to till it or put any fertilizer in the dirt. It's kind of neat how he does it.

I had 24 chickens until this spring when I ordered a few more of a different breed to try out. My coop is 12X12. I am going to have to rearrange the roosting poles since I have more going up on them at night. I had two hens hatch out some chicks, and they are also going up on the roost now. I also have my laying boxes inside the coop along one wall.