Size: Recommended Age: 2 - 3 years old; Length: 5.9 inches (15 cm); Recommended Age: 3 - 4 years; Length: 6.3 inches (16 cm); Recommended Age: 4 - 5 years; Length: 6 - 7 years; Recommended Age: 7 - 8 years; Length: 7 - 8 years; Length: 7 inches (20 cm).