The official size of a volleyball is between 25.6 and 26.4 inches in circumference and between 9.1 and 9.8 ounces in weight.
Not sure if you mean the ball or rim height, but it is regulation full size on both, NBA ball, 10' rim height.
Each side of an Indoor Volleyball court is 9m x 9m In beach volleyball, each side is 8m x 8m
The official size of a volleyball is between 25.6 and 26.4 inches in circumference and between 9.1 and 9.8 ounces in weight.
Full size
The official NBA men's ball is a size 7 at 29.5 inches. The official WNBA womens's ball is a size 6 at 28.5-29 inches.
Synthetic leather material and colour combinations of balls used in International Official competitions should comply with FIVB standards. Circumference is 65-67cm (25.59-26.38 inches)
142grams
The official NBA ball size is 29.5 inches in circumference.
A standard size volleyball weighs anywhere from .26 to .28 kilograms, depending on the manufacturer or style (beach or indoor volleyball). In most cases, volleyballs weigh about the same (unless a modified ball, like a children's volleyball, is used).
The official size of a T-ball is 9 to 9 1/2 inches in diameter, weighing between 4 and 5 ozs. The t-ball will have a softer core than a traditional Baseball for the safety of the players.
The official answer is 10 1/2. But who really wants to know this?