How long is a standard baseball bat?
Baseball bat
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In some 12-year-old-and-under youth leagues (such as Little League baseball), the bat may not be more than 21⁄4 inches (57mm) in diameter.[22]  However, in many other leagues (like PONY League Baseball, and Cal Ripken League Baseball), the bat may not be more than 23⁄4 inches (70mm) in diameter.[23]