The exterior dimensions of any vehicle are listed in the vehicle's accompanying owner's manual. If the owner's manual is not available, the car maker's website may also provide the information.
If the maker's website provides no information, individuals may be able to find an electronic copy on websites such as JustGiveMeTheDamnManual.com or on used car catalogue websites such as MotorTrend. Resources such as Wikipedia also frequently list the dimensions for various vehicle models.
The user must be exact about the make, model, and year of the vehicle to get the correct documentation. If searching unofficial sources, it is worth checking more than one source to confirm the specifications. Forums and mailing lists for car enthusiasts may also provide the necessary information, but additional research may be necessary to confirm the information.
For finding information offline, calling a dealership of the relevant vehicle make may prove helpful. Representatives at the dealership may be able to look up dimensions for a specific vehicle model immediately or know how to obtain the information from official sources. If the owner is unsure of the model year, she should take the vehicle to a dealership or garage for a mechanic or company representative to inspect the vehicle.