Olympic sized pools are 50 meters long and 25 meters wide with a minimum of 2m of minimum depth. The recommended depth is 3m on the deep end of the pool.

Each baseball team is composed of nine players. They take turns playing offense, either batting or baserunning, and defense, meaning pitching or fielding. A pair of turns, one at the bat and one in the field, is called an inning. Each baseball game has nine winnings so that all players from both teams can play.

Whether it is a gym, a park, or a professional court, the basketball hoop is always roughly 10 feet(3m) off the ground. The reasoning behind this decision is because when James Naismith invented the sport in 1891, he hung peach baskets, on the railing of the running track of the YMCA gym in Massachusetts. That railing was 10 feet off the ground.