What size and weight is a standard Irish hard ball?

A standard Irish hard ball, also known as an "alley cracker," has a diameter of approximately 1.9 inches (4.7 cm) and weighs between 1.5 and 1.75 ounces (43–50 g).1

This ball is constructed with a center made of cork or wood, which is then wrapped in woolen thread and thin layers of cork or rubber, and finished with an outer cover of thin sheepskin. While soft rubber balls are often used in schools and some tournaments, the hard ball remains the recognized medium for official championships.1