I made mine out of scrap but you can use 2 x 4 and 2 x 6 wood.
13 inches high, 10" wide and 20" long. The ramps are 10 feet long.
I painted it Ford blue.
I pined it together so I could take it apart and stack it in the corner when I'm not using it. You need 10" x 10 feet to store it.
Dwight