Rule

Y.M.C.A. One-Wall Rules · American one-wall, small ball

Ball

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

The ball known as the "Irish Ace" made of rubber and about 1⅞ inches in diameter is best, for it fits the hand and the players are more accurate with it. A tennis ball, however, may be used.

Mentioned here

How these ideas connect in this rule

No link to the other terms shown: Ace.