Gardirect Natural Bird Houses, Traditional Wooden Bluebird House, Small Size This bird house is made of pine. The beautiful sloping roof is convenient during rainy days. Easy to affix to a tree, wall or fence post. The small front door down below makes it easier to clean. Dimensions: 4-5/16-inch in length, 4-5/16-inch in width, 8-1/2-inch in height.