Hey, this is the first design I made myself.

Its designed to be strong enough to hold a 180mm board on the Ikea Skadis system.

I printed it sideways with support for the hooks, works well for me.

measurements:
170mm depth
50mm width

Disclaimer: This 3D print model is provided "as is." Use at your own risk. I make no guarantees regarding its stability or suitability for any specific purpose.