Basketball court dimensions in practice
vary in overall length and width. In many
areas of the country, older high school
gymnasiums in particular have smaller overall
size than regulation. Many of these same
gyms have varying backboard designs and
dimensions.
Even though Pro,
College, High School and Junior High
School courts may differ on overall size
and layout, the interior markings for the “Foul
Line”, “The
Key” and “The Backboard and
Rim” are the same. The NBA court
has a unique 3 point line (arc).
Regulation Sizes-
Official Measurements:
Court Size Overall:
- NBA and College – 94
feet long and 50 feet wide
- High School – 84 feet
long and 50 feet wide
- Junior High – 74 feet
long and 42 feet wide
The Foul Line:
For all courts the “foul
line” distance is 15 feet from the foul
line to the front of the backboard. This measurement
is commonly confused as from the center of the
basket and front of the rim.
The Key:
Standard for all basketball
courts, “the key” (sometimes called “the
lane”) is 12 feet wide. Regulation courts
have the backboard extending out 4 feet over
the baseline into the key. A 6 foot arc (half
circle) extends from the foul line away from
the basket to complete the key.
The 3 Point Line (Arc):
Womens College and High School Basketball
Courts – the
3 point arc is 19 feet 9 inches.
NBA Basketball Courts – the
3 point arc is 22 feet to the center of the rim
on the sides with a straight line extending out
16 feet 9 inches from the baseline. Past those
points the line extends out 23 feet 9 inches
from the center of the rim.
Mens College Basketball
Courts – the
3 point arc is 20 feet 9 inches.
The Backboard and Rim:
The regulation distance from
the ground to the top of the rim is 10 feet for
all levels of play. Regulation backboards are
6 feet wide (72 inches) by 42 inches tall. All
basketball rims (hoops) are 18 inches in diameter.
The inner square on the backboard is 24 inches
wide by 18 inches tall.
All line markings on the floor
are 2 inches wide and can vary in color.
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