American Football fields are rectangular playing fields with a required length of 120 yards  (360’ | 109.75 m) and a width of 53.3 yards (160’ | 48.8 m). Based on yards, the field of play in a game of football refers to the 100 yards between the two opposing end zones on either side of the field at 10 yards | (30’ | 9.15 m) deep. White markings designate each individual yard on the field and are separated by full field lines every ten yards. The central hash marks are located 20 yards (60’ | 18.25 m) inwards from each team’s side line. Team areas are centered at the 50 yard line and extend 25 yards (75’ | 22.8 m) in both directions. American football fields are made of either natural grass or artificial turf.