Croquet

Croquet is played on a level surface (court) with 2 or 4 players.

The ball must pass through each of a set of hoops laid out in a specific pattern.
The balls must pass through once in each direction.

At higher levels of play the ball only clears the hoop by a few millimetres.

For more on the rule see http://www.croquet-australia.com.au/How_To_Play/

The court is 32m by 25.6m