Get started with this fun DIY kit. Choose a nice spot where the birdhouse can hang and the project can begin! All you need is a hammer. Everything you need is in the kit. The shelves are made of light wood and the birdhouse has a hole of 25 millimeters. Dimensions: 13 centimeters high and 16 centimeters wide. The depth is 14.5 centimeters. Including instruction.