According to www.cdnfootball.info: "Canadian Football League rules specify that the long circumference of the ball should be not less than 27¾ inches (705 mm) nor greater than 28¼ inches (718 mm), while the short axis should be no less than 20⅞ inches (530 mm) nor greater than 21⅛ inches (537 mm). The dimensions of the official National Football League and National Collegiate Athletic Association football are specified by its manufacturer as: short circumference: 20¾ to 21¼ inches (527 to 540 mm), long circumference 27¾ to 28½ inches (705 to 724 mm)."
Chat with our AI personalities