My local vert ramp is roughly 11 foot high 23 foot wide. It was steel from 1992 until 2017 when it got a face lift and is now sheeted in a SkateLite-type product made in oz called hARD. There is a 9 foot almost vert ramp as well. The ramp is in a part of Canberra called Tuggeranong, Australia.
The ramp was sessioned by a car a month after it was resurfaced.