This profile size is 75x27mm. It can be used as a wall border running along the wall. Not only that, with one part higher than the other side, this profile can be used as a door frame as well.

If you are creative enough, you can put it to the wall as a rectangle and square. Of course the are must be big enough that it won't make the area too small.

And yes, you can put this as a cornice too.  Try imagining it.