The size and dimensions of Formula One cars are tightly controlled by the regulations. They must be no more than 180cm wide. The length and height of the car are effectively governed by other specific parameters.
For example, bodywork ahead of the rear wheel centre line must be a maximum of 140cm wide. Bodywork behind it must be no more than 100cm wide. Front and rear overhangs are limited to 120cm and 60cm respectively from the wheel centre lines.
The strict regulations mean that the teams inevitably end up with very similarly sized cars. As a typical example, the 2007 season Toyota TF107 is 453cm long, 180cm wide and 95cm high.