I just got my Century Royal Topper. I like the look and the convenience of the topper. I had a hard time picking between the Leer and the Century but I went with the Century.
On the front of the topper (near the cab) it is 21 1/4 inches from the bed to the roof. Near the back of the topper it is 22 1/4 inches from the bed to the roof. I guess there is one inch of rise there even though I don't see it.
On the back window there are no hinges per see (they are hidden) but it is 21 inches from the tailgate to the top of the glass window. :chevy: