I made a bird feeder using yakisugi (charred cedar) boards. Here are some photos showing how it's used. The food container is detachable, making it easy to clean. The hole is approximately 11cm in diameter, and a plastic dish is set in it, but you can replace it with something else to your liking. The main dimensions are as follows: Length: Approximately 14.5cm Width: Approximately 24cm Total height (including screws and dish): Approximately 3cm Hole diameter: Approximately 11cm This is the work of an amateur DIY enthusiast, so it's not perfect, but I made it as carefully as possible. I hope you will find it useful.