Not much bigger than an eglu:She has been convinced to get a bigger coop.
https://www.tractorsupply.com/tsc/product/producers-pride-villa-chicken-coop-12-chicken-capacity Look at how amazing this coop is that she found! It is so amazing! The roomy 4.4 square feet! We are definitely looking for a new coop because ours are way too big for anything less than 8 million chickens
"4.4 sq. ft. coop accommodates up to 12 chickens"
With terrible population ratio.