Duckpin bowling is a variation of the sport of bowling. Duckpin balls are 4+3⁄4 in (12 cm) to 5 in (12.7 cm) in diameter, weigh 3 lb 6 oz (1.5 kg) to 3 lb 12 oz (1.7 kg) each, and lack finger holes. They are thus significantly smaller than those used in ten-pin bowling but are slightly larger and heavier than those used in candlepin bowling.