Basketball the basketball is also regulated. For men, the official ball is in circumference (size 7, or a "295 ball") and weighs 22 oz (623.69 grams). If women are playing, the official basketball size is in circumference (size 6, or a "285 ball") with a weight of 20 oz (567 grams). In 3x3, a formalized version of the halfcourt 3-on-3 game, a dedicated ball with the circumference of a size 6 ball but the weight of a size 7 ball is used in all competitions (men's, women's, and mixed teams). The ball may be advanced toward the basket by being shot,
Official (basketball) action. Especially difficult is the "charge/block" call as to which player is responsible for contact. Officials often rely on instant replay to review plays. Despite the misconception that basketball is a non-contact sport, officials often let a large amount of marginal or incidental contact pass uncalled. An official must always be wary of not just what is happening around the ball, but the roughness of play going on around the whole court, adding to the job of the official. Further complicating the job of an official is the proximity to the crowds. Unlike football or baseball, the crowd is nearly