You'll need a rectangle of grass the size of the shaded area in the diagrams. The width is adjustable.
1. Standard size - 2.0m deep, and between 8.3m and 6.3m wide and 3.1m High.
2. Large size - 2.3m deep, and between 10.5m and 8.5m wide and 3.1m High.
Make sure you position Open Goaaal! on fairly flat ground or with an even slope.
Poles and guy ropes MUST be anchored in firm grass, not a soil border.