This beautiful Coppertop bluebird house is ornithological correct, so it is specifically designed to attract bluebirds, It features a laser-etched front, 1-9/16"" hole size and is pre-drilled for easy mounting, Dimensions: 8, 75"" L x 7, 75"" D x 13"" H, Hole Size: 1-9/16"", SKU: WDLNK013