How big is an outdoor polo field?

Polo is a horseback ball game, a traditional field sport and one of the world's oldest known team sports. The game is played by two opposing teams with the objective of scoring using a long-handled wooden mallet to hit a small hard ball through the opposing team's goal. Each team has four mounted riders, and the game usually lasts one to two hours, divided into periods called "chukkas".

Polo has been called "the sport of kings", and has become a spectator sport for equestrians and high society, often supported by sponsorship.

The playing field is 300 by 160 yards (270 by 146 m), the area of approximately six soccer fields or nine American football fields (10 acres), while arena polo is 96 x 46 metres.

Although the exact origins of the game are unknown, it most likely began as a simple game played by Iranian and Turkic equestrian nomads in Central Asia, with the current form originating in Iran (Persia) and spreading east and west. In time, polo became a Persian national sport played extensively by the nobility. Women played as well as men.

The modern game of polo is derived from Manipur, India, where the game was known as 'sagol kangjei', or 'pulu'.