The Nestling Cottage Birdhouse in Green actually has six window details in addition to its entry hole! Constructed of exterior grade ply-board, Pine roof shingles and poly resin for detail and decorations. The swing-up mounting peg makes installation a snap. All the right stuff make this a fully functional birdhouse: 1. 25" opening, removable back wall, drainage, ventilation and an unpainted interior. Item Dimensions: 7. 75? H X 6. 25? W X 5? D.