This Bluebird House is handmade with 5/8 inch solid cedar. Has 1 1/2 inch entry hole 6 inches from the bottom. Bird house is 13 1/2 x 6 x 6 with a 4 1/2 x 4 1/2 nesting area.  The front flips open for easy cleaning after each brood as some bluebirds have 2 to 3 brood each year. The front has grooves to allow the young ones to get out. Vent holes on the sides and bottom. Mounting holes pre drilled on top.  Each Bluebird House comes with mounting, cleaning, and placement instructions.