Prevue Pet Products solid hardwood nest boxes with indented bottom center to prevent egg rolling. Top opening for easy cleaning and removal of bedding materials. Nest boxes are made from Simon Poplar and measures 4-7/8inLong, 4-7/8inWide and 5-7/8inHigh. This Product/Package Measures: 4.88 in. L x4.88 in W x5.88 in D