Generally, the rules are the same as the laws of football except for some modifications. For example, the standard field dimensions are 12 m by 18 m. The official tournament ball used in matches is any orange FIFA standard size 5 football. Only 5 robots per team may play on the field, including the goalkeeper.
The robot must fit inside a 52 cm × 52 cm × 80 cm box.
The keeper can also temporarily increase its dimensions to 60 cm × 60 cm × 80 cm or 52 cm × 52 cm × 90 cm. But only for 1 second, if the goal is endangered by an approaching ball. After complete reducing its size, he has to wait 4 seconds before he is allowed to expand again.
The maximum weight of the robot is 40 kg. The base color of a robot's body must be black. The paint or used material must be matte in order to minimize reflectivity.