This nest box shold be mounted on a pole with the entrance hole at least 5 feet above ground.  Place in open area with scattered trees or shrubs and low ground cover.  Bluebird nest boxes should be placed at least 100 yards apart.  The nest should be removed after each clutch leaves the nest.  Side swings open for cleaning.  NABS approved.  Measures: 7 3/4L x 7W x 17H