24-25(15cm suitable for 2-3 years old)
26-27(16.5cm suitable for 3-4 years old)
28-29(18cm suitable for 4-5 years old)
30-31(19cm suitable for 5-6 years old)
32-33(20cm suitable for 7-8 years old)
34-35(21cm suitable for 9-10 years old)
40-41 (suitable for 39-40 feet)
42-43 (suitable for 41-42 feet)
44-45 (suitable for 43-44 feet)
