Playing field
The playing field is 100m long and 37m wide. The perimeter lines at each end are the endlines and the perimeter lines at each side are the side lines.
The perimeter lines are not part of the playing field.
The goal lines are the lines that separate the central zone from the end zones and are part of the central zone. The end zone is 18m long and 37m wide. The central zone is 64m long and 37m wide.
The brick mark is the intersection of two crossed one metre lines in the central zone. The brick marks are 18m from each goal line, midway between the side lines.
Eight brightly coloured, flexible objects (such as plastic cones) mark the corners of the central zone and the end zones.
There is a 3m run‑off zone surrounding the playing field. If play is obstructed by non‑players or objects within 3m of the run‑off zone, any obstructed player or thrower in possession may call “Violation”.

References
WFDF Rules of Ultimate 2013.
https://rules.wfdf.org/
Sport association details