These boxes, made of sturdy cypress wood, will last for years. Predrilled for hanging, they will attract bluebirds to your farm or to public places such as parks, golf courses and schools. Dimensions: 10.75" X 5" X 5" with 1.5" diameter entrance. Availability: Usually ships the same business day Bluebird Nesting Box BBH-W$13.25, 10/$122.50 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.