All over the field, you see a bunch of white lines. Every line has a special meaning, as shown in Figure 2-1:
End lines: The lines at each end of the field are called the end lines.
Sidelines: The lines along each side of the field are called the sidelines.
Goal lines: The goal lines are 10 yards inside and parallel to each end line.
Field of play: The area bounded by the goal lines and sidelines is known as the field of play.
50-yard line: The field is divided in half by the 50-yard line, which is located in the middle of the field.
End zones: The two areas bounded by the goal lines, end lines, and
sidelines are known as the end zones.
To make all these white lines, teams use paint or marking chalk. They’re even painting grass fields these days. The end lines and sidelines are 4 inches wide and rimmed by a solid white border that’s a minimum of 6 feet wide. All boundary lines, goal lines, and marked yard lines are continuous lines until they intersect with one another.
The field also contains yard lines, hash marks, and lines marking the player benches, which I describe in detail in the following sections.