The perfect birdhouse at the perfect price. Box measures 12.25” x 6.25” x 5”. Hole diameter 1.5”. Drainage hole in bottom, front pivots on screws 3/4” from bottom for easy clean out. 3/4” thick square predator guard box over opening. Cross ventilation vent holes on sides and under slanted roof, which extends over opening and sides. Back extends 1.375” beyond box with 2 additional screw holes .5” from top and .75” from bottom for easy mounting. Netting on inside of front for easy exit by chicks.