The width will depends on what wheels are on the car, standard wheels and you'll just about get it on a 5ft 5inches wide trailer, as for the length, that depends if theres a kit on the car, if there is it'll make it longer but on a lot of trailers either the front or the rear of the car should be able to hang over the end of the trailer.. i can measure the length of an S14 tomorrow if it helps!