24 x 18
A NBA regulation backboard is 72" wide x 42" high
A regulation backboard in the NBA has the dimensions 6 ft x 3.5 ft.
The outside measurement of the painted square on a regulation Size Basketball goal is 24"wide by 18" tall
how do we find out the size of the markings of the inner square on the backboard
The regulation size for a high school basketball rim is 6 ft wide by 42 inches tall. Basketball rims are 18 inches in diameter.
A regulation sized basketball is 29.5 inches. A 10 and under size basketball is 28.5. 28.5 is also the regulation size for women's basketball.
2 by 2
The official NBA basketball backboard is 72 inches (6ft) by 42 inches (3.5ft)
This is the regulation size for womens basketball. Often this is also the sized that is prefered to be used for youth basketball as well. It is smaller than the size of a regulation men's basketball.
Regulation backboards are 6 feet wide (72 inches) by 42 inches tall. All basketball rims (hoops) are 18 inches in diameter. The inner rectangle on the backboard is 24 inches wide by 18 inches tall.