Brokaw One-Wall Rules · American one-wall, small ball
Rule 52
HistoricalBrokaw One-Wall Rules, 1916 (historical)
The ball must be not less than one inch and seven-eighths of an inch and not more than two inches in diameter, when inflated with air pressure to thirty pounds per square inch, made of gum and carbon and to weigh not more than two and one-quarter ounces and not less than two ounces.