This is what I did for you our kids. Used a bull nose but in a router for the engraving. The graduations were done with a straightedge while the numbers were freehanded over pencil lines.

I then spray painted it black and sanded off the paint from the flat surfaces, leaving it paint in the engraving troughs.

Their heights are simply penciled on.

We’re pretty pleased with it. It looks nice and doesn’t feel out of place.

I like the hamster & wine bottle decor