Metric Whiteboard Set Square (24cm / 30cm)

Intended to stick some flat magnets on the bottom to put it on a whiteboard, but also usable on paper. I only printed the 24cm version because it is big enough for me. Would be nice to see the 30cm in reality so I'd be happy if someone would share their make.

I tried to implement only the necessary features so it isn't overloaded, looks nice, and no one would use this for high precision drawing anyway. It's more intended to draw some straight lines and tables on a whiteboard.