size

waist

hip

length

  reference age

45

- - 45-50cm 1-2 years old

50

- - 45-55cm 3-4 years old

55

- - 50-60cm 5-6 years old

60

- - 55-65cm 6-7 years old

65

- - 65-75cm 7-8 years old

70

65-78cm 8-9 years old