Handball
Rule

A.A.U. Four-Wall Hardball Rules · American four-wall hardball (1930s-40s)

Rule 2

HistoricalA.A.U. Four-Wall Hardball Rules, 1931 (historical)

Historical rulebook: not the current rules. The current rules are here (USHA Four-Wall Rulebook, as of 26 January 2025).

The ball shall be a standard hard ball. The size should be not less than 1⅝ inches nor more than 1⅞ inches in diameter; and the weight not less than 1½ ounces nor more than 1¾ ounces.

The material used should be the best grade rubber and yarn in the correct proportions to ensure the proper speed.

Mentioned here