You can quickly find tire and loading information sticker on inside frame of driver side door. This information can be also found on vehicle manual which is usually kept inside your glove box. On some vehicles this sticker can also be found inside fuel tank hatch door. Usually this informations include different tyre size specifications, load specifications and recommended inflation pressure details.

If you still have factory fixed tires on your car then you can also refer tyre size from the side wall on your tires.

For the same make and model of vehicle there can be different tyre sizes. So it is always recommended to refer vehicle manual and informations displayed on your car.