80" long by 70" wide outside dimensions. 3" inside lips and 2" front lip. We had it on a 2019 F150 mid size box (approx 6.5' length). We bought it used and not sure what it had been used on before. No leaks we ever saw. Rear window gate opens upward fine. Never used the electrical but it is on the unit. No keys to lock. Slide side windows approx 14" at rear of unit with screens. Fixed front (cab end) window. Approx 22" height. Clamps included.