Distributions from AAA From TaxAlmanac, A Free Online Resource for Tax Professionals Note: You are using this website at your own risk, subject to our Disclaimer and Website Use and Contribution Terms.
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).
Weight of a Major League Baseball According to the rule book, a  baseball must weigh at least 5 ounces and can not exceed 5.25  ounces.    Official balls must weigh b â¦ etween 5 and 5 1/4 ounces.