Baseballs - Walmart.com
www.walmart.com › browse › sports-outdoorsMost baseballs, whether they're Rawlings baseballs or Diamond baseballs, are around 9 inches in circumference, which is an ideal size for casual play among friends or family. Regulation baseballs, on the other hand, must be a specific size and weight for use in any sanctioned league play from Little League all the way up to the Major Leagues.