The openings for the birds are roughly 3" tall by 2" wide. This is a beautiful purple martin birdhouse condo. Does not include the pole. Sits right over the top of a 4X4 post.Minimal assembly required. (finial and the 4 bottom side pieces that sit over the post.Resin like base makes it easy to clean and does not rot like regular wood. The top comes off. There are 2 screws that hold it on. Once the top is off you can take a hose and wash out.*Caring for the roof, we recommend using a clear overspray (such as Rust-Oleum 2X) at least once a year for added protection against possible fading/discoloration. Lots of character.28" tall X 15" X 15"Because these are oversized packages, we do NOT offer gift wrapping. Sorry for any inconvenience.