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The rules of Major League Baseball, section 1.09 states:

// "The ball shall be a sphere formed by yarn wound around a small core of

// cork, rubber or similar material, covered with two stripes of white

// horsehide or cowhide, tightly stitched together. It shall weigh not less

// than five nor more than 5 1/4 ounces avoirdupois and measure not less than

// nine nor more than 9 1/4 inches in circumference."

//

// http://mlb.mlb.com/NASApp/mlb/mlb/baseball_basics/mlb_basics_objectives.jsp

mincirc = 9 inches

maxcirc = (9 + 1/4) inches

minweight = 5 ounces

maxweight = (5 + 1/4) ounces

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15y ago
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12y ago

9'' around 5 ounces

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Q: What is the regulation size and weight of a baseball today?
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