Are you planning on have standard sized birds? 
I wouldn't go any smaller then 4 square feet per standard sized hen in the coop.
Do sure to count the feeder and waterer as taking up space as well.
And more space is always a plus.
In the run they should have at least 10 square feet per bird, but again bigger is better.
Also the bigger the coop is the less messy it will seem.
	
		
			
		
		
	
				
			I wouldn't go any smaller then 4 square feet per standard sized hen in the coop.
Do sure to count the feeder and waterer as taking up space as well.
And more space is always a plus.
In the run they should have at least 10 square feet per bird, but again bigger is better.
Also the bigger the coop is the less messy it will seem.
 
	 
 
		 
 
		 
 
		 
 
		 
	 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
	 
	 
 
		 
	 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		