This popular window feeder allows you to view your birds so close you won't believe it with one way mirror film encasing the glass. You see the birds, they don't see you! This feeder fits inside your window sill and its convenient trap door allows you to clean it and refill it right from inside your home. Its unique engineering allows you to shut and lock your window with the feeder in place and snugly fits double hung windows up to 39" wide with its adjustable side panels. The feeder is constructed of show quality cedar and features a shatter-proof window for your viewing pleasure. Installation is a snap, no nails or screws, no mess. Even comes complete with additional insulation material if you live in colder climates. You can fill it with your favorite seed and watch the birds in your living room within minutes of taking it out of the box. Whether you live in a city apartment or on a farm this feeder will delight you for years to come. 22 inches long X 8 inches deep X 13 inches high.