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As of 2008 the circumference of a regulation size baseball is between nine and nine and a quarter inches which converts to between about 7.3 cm and 7.5 cm in diameter according to the official rules of Major League Baseball (MLB).
The 11.5 inch size of the Wilson A2000 Baseball Glove (A20RB15DP15GM) would provide a slightly larger pocket than an 11 inch model which could make it better for outfield play but it would still be more of an infield glove.