Alliance wall/ 3rd platform

So I was reading the manual once more(time number 3) and I am still confused as to what part the robot must be under when on the third platform. My team believes that it means the entire wall and not just the diamond plate (I believe that’s what it is called) but I am not sure. Thoughts? Am i missing something in the manual still?

G12. Duck in the HAB ZONES. A ROBOT with its BUMPERS fully in either HAB ZONE may not extend
above the ALLIANCE STATION WALL, i.e. more than 6 ft. 6 in. (~198 cm) above the carpet.

Seems pretty self explanatory to me. From what you’ve seen elsewhere in the manual and your past experience, about how tall is the entire wall versus just the diamond plate?