Ten-pin Bowling Pins
Pin specifications are set by the World Tenpin Bowling Association. Regional associations such as the United States Bowling Congress and the British Tenpin Bowling Association adapt to the WTBA standard, so that specifications are standard world-wide. Pins are 4.75 inches wide at their widest point and 15 inches (380 mm) tall. They weigh 3 lb, 6 oz, although as of 1998 pins weighing up to 3 lb 10 oz (1.6 kg) are approved. The weight of the pins were originally based on the principle of physics, with the idea that a pin should be at around 24-percent the weight of the heaviest bowling ball within regulation of 16 lb 0 oz (7.3 kg).
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