For my 2019 F150 STX Super Crew:Took the unit out of its carton, and simply tossed it into position under the back seats, a perfect fit. Height is exact occupying the gap below the rear seats, and from end to end. The container has a strap to lash it to existing positions, and the bottom grips the carpet preventing sliding out when hard braking. Interesting was how the price increased after my purchase (from $73 to over $100). A good deal for me!See full review