Size Height (inches) Height (CM)
3M 21.5 - 24 55 - 61
6M 24 - 26.5 61- 67
9M 26.5 - 28.5 67 - 72
12M 28.5 - 30.5 72 - 78
18M 30.5 - 32.5 78 - 83
24M 32.5 - 34 83 - 86