Diameter: 8½ inches. Weight: no more than 16 pounds. The lighter balls are used by women and juniors.
Weight: between 3 pounds 2 ounces and 3 pounds 10 ounces. Height: 1 foot 3 inches. They are set in a triangle 3 feet on a side.
The lane is 3 feet 6 inches wide and 60 feet long. A minimum approach area of 15 feet is required. Guide marks are placed on the lane 7 feet from the foul line, and 12 to 16 feet from the foul line.
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Last revised: 15 November 2006.