An American football field is 160 ft (53 yd; 49 m) wide and 360 ft (120 yd; 110 m) long, including two 10 yd (9.1 m) long end zones.
A Canadian football field is 65 yd (59 m) wide and 150 yd (140 m) long, including two 20 yd (18 m) long end zones.
Media in the UK also use the football pitch as a unit of length, although the area of the association football pitch is not fixed, but may vary within limits of 90–120 m (98–131 yd) in length and 45–90 m (49–98 yd) in width. The usual size of a football pitch is 105 m × 68 m (115 yd × 74 yd), the dimensions used for matches in the UEFA Champions League.
A stadium (plural stadiums or stadia) is a place or venue for (mostly) outdoor sports, concerts, or other events and consists of a field or stage either partly or completely surrounded by a tiered structure designed to allow spectators to stand or sit and view the event.
Pausanias noted that for about half a century the only event at the ancient Greek Olympic festival was the race that comprised one length of the stade at Olympia, where the word "stadium" originated.
In modern times, a stadium is officially a stadium when at least 50% of the actual capacity is an actual building, like concrete stands or seats. If the majority of the capacity is formed by grasshills, the sports venue is not officially considered a stadium.