Birdhouse Size Chart
Birdhouse size chart Attract Birds to the Right Size Birdhouse House wrens are happy with an 8-inch-tall house with a 4- by 6-inch base, while a chickadee birdhouse should be 8-inches tall with a 5- by 5-inch base. Bluebirds need more room, so a box that's 5-1/2 by 5-1/2 inches and 10 inches tall is perfect.