In general, the length, height, weight and width of vehicles has been increasing since 1990. The width of a compact sedan is about 5 3/4 feet, while a mid-size version is nearly 6 feet. A large sports utility vehicle measures 6 1/2 feet across. A mid-size SUV is a bit more than 6 feet wide, and a compact style is just under 6 feet in width. Learn more about Car Makes & Models