Size 0 - 0-3 mths (length approx 10cm)
Size 1 - 3-6 mths (length approx 11cm)
Size 2 - 6-12 mths ( length approx 11.5cm)
Size 3 - 12-18mths (length approx 12cm)
Size 4 - 18-24mths ( length approx 13cm)