How Big Is a Polo Ball and What Is a Polo Ball Made Of?

Traditionally a polo ball is made of willow root, but hard plastic has made significant inroads in the game.

The outdoor polo ball is about 3¼ inches in diameter and weighs about four ounces.

For indoor polo, players bat around an inflated leather ball 4 1/2 inches in diameter.

The oldest polo ground in the world is the Imphal Polo Ground in Manipur State in India.