ASA 12U Softball Rules


The Amateur Softball Association (ASA) is the governing rules authority for softball players across the country. ASA rules for 12 years of age and under (12U) may vary, depending on the league and location. All players, coaches and umpires must have a clear understanding of ASA rules to ensure fair, fun and competitive play.



  • A safety bag must be used at first base. White or yellow softballs are 12 inches in diameter and weigh at least 6.75 ounces. Official softball bats must be no more than 34 inches long and 38 ounces in weight with an ASA-certification mark (no wooden bats or open-barrel bats allowed). Catchers are required to wear protective equipment when catching, including a helmet, mask, throat protector, chest protector and shin guards. All batters must wear batting helmets and runners (no cleats).

12U Special Rules

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  • Photo Credit baseball kids image by Linda Mattson from Softball glove image by paolanogueras from young baseball catcher image by pixelcarpenter from softball image by Steve Brase from
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