The official one is like $130.
An NBA basketball weights 22 ounces
The size is the biggest difference. Also the grooving on it, and the colours of it differ from a NBA-official ball.
They are around $5.
There the same size, 29.5
The official height for an NBA basketball hoop/stand is 10 feet.
It is the official bank of the NBA.
the siz e of my mouth precisley 1 inch
The official NBA ball size is 29.5 inches in circumference.
The link has the official rules for the NBA.