Size Height (inches) Height (CM) Weight (lb) Weight (kg)
3M 21.5 - 24 55 - 61 8 - 12.5 3.6 - 5.6
6M 24 - 26.5 61- 67 12.5 - 16.5 5.7 - 7.5
9M 26.5 - 28.5 67 - 72 16.5 - 20.5 7.5 - 9.3
12M 28.5 - 30.5 72 - 78 20.5 - 24.5 9.3 - 11.1
18M 30.5 - 32.5 78 - 83 24.5 - 27.5 11.1 - 12.5
24M 32.5 - 34 83 - 86 27.5 - 30 12.5 - 13.6