Here is a profile. I also suggest rounding over the top. Now, if you really like this idea, cut first, then put the lettering on the slanted surface. These would also make good awards. To cut the lettering on the slanted surface, you'd need a jig, cut to the angle of the slant to support it underneath so the CNC or router had a horizontal surface to work on.
Here are a couple of profiles, vertical for the suggested angle cut and bead, the horizontal to suggest how to support the back so the surface is horizontal for doing the lettering. The gray block could be much wider and longer than needed for these little guys so you can do larger signs. Double sided tape or sandpaper on the surface of the gray support block will hold the workpiece firmly in place.
The more I do, the less I accomplish.