I'm in the process of building my coop. I plan on putting my nests on the wall with outside access for egg gathering. I picked up some plastic dish tubs at Walmart to line them with. They measure 11 1/4" wide and 13 3/4" long and 5 1/2" deep, inside the tub. Outside measurements are 12 1/2 wide and 15 1/2 long. The nests will be made out of wood with the tubs for liners for easy cleaning. I plan on getting a mix of heritage type chickens, Orpingtons, Wyandotte, Austrolops and the like. They will be hatchery chickens since I don't know any breeders to get "real" heritage chickens from. Do ya'll think those will be big enough? Also, they are a dark red. I don't know if the color would be a problem or not. The tubs are just like this one: http://l.yimg.com/ck/image/A1058/1058306/300_1058306.jpg What size nest do ya'll use?