The football field is a rectangle
120 yards (ca. 110 m) long and 53 1/3 yards (50 m) wide, defined
by sidelines running
the length of the field and endlines running the width. There is
a goal line ten yards in from each end line and parallel to it. The
two goal lines are thus 100 yards (90 m) apart. The area of the field
between the goal lines is called the field of play.
At each end of the field, the end zone is the area between the
goal line and the end line.
field of play, additional markings include yard markers, as well
as inbound lines (also called hash marks), every yard the
length of the field. The inbound lines (hash marks), which
are short lines perpendicular to the yard markers, differ in
from the sidelines at each main level of the game:
NFL: 70¾ feet (21½ m)
from the sidelines; this means that the hash marks are separated
from one another by the width
of the goalposts.
feet (18¼ m)
from the sidelines.
school: 53 1/3 feet (16¼ m) from the sidelines, dividing
the field into thirds.
Every 5 yards (4.5 m), the yard markers run the width of the field,
and every 10 yards, they are marked by numbers indicating the distance,
in yards, from the nearest goal line.
At the center
of each end line is a set of goal posts, which have two upright
extending above a crossbar. The distance between
upright posts is 18½ feet in general and 23 1/3 feet in
high schools (5½ m, 7 m), and the top of the crossbar is
10 feet (3 m) above the ground.
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