<P> Australian rules football grounds, even at the highest level of the game, have no fixed dimensions . For senior football, the playing field is an oval, typically between 135--185 metres long goal - to - goal and 110--155 metres wide wing - to - wing . Grounds can vary from long and narrow to almost circular, and are not necessarily symmetrical, depending upon how and where the field was constructed . At least 5 metres of space between the boundary line and any fence is required for safety . </P> <P> Smaller fields are generally used for junior football; some are purpose - built, and some are temporarily marked out within the confines of full - sized oval; as for a senior match, there are no fixed dimensions for a junior - sized field . The Western Australian Football Commission advises that a good rule of thumb is to set the length of the field equivalent to 31⁄2 times the length of an average kick of the age group playing . </P> <P> A top - level Australian rules football ground has the following markings: </P> <Ul> <Li> Two goal - lines, one at each end of the field, which are straight and 19.2 m (21 yds) long . </Li> <Li> Two boundary lines, which are curved around the edge of the field and connect the two goal - lines . Together, the boundary - lines and the goal - lines mark out the playing area, in a slightly truncated oval . </Li> <Li> Two goal squares, one at each end of the field, which are 6.4 m × 9m (7yd × 10yd) in front of each goal - face . The line parallel to the goal line is called the kick - off line . The goal square is the area from which a kick - in can occur . </Li> <Li> The centre square, which is 50m × 50m in the centre of the ground . This square dictates how many midfielders can be present at a centre bounce . </Li> <Li> The centre circles: two concentric circles of 3 m and 10 m diameter, with a line bisecting them running wing - to - wing . These markings dictate where the ruckmen can stand during a centre bounce . </Li> <Li> Two fifty - metre arcs: a circular arc at each end of the field drawn between the boundary lines at a distance of 50m from the centre of the goal - line . Except in competitions which allow for super goals, these arcs serve only as an informative visual indicator of distance . </Li> <Li> Interchange gates: two short markings on the boundary line near the interchange benches, which dictate where players may enter and exit the ground for interchanges . </Li> </Ul>

How big is an aussie rules football field