Please compare baby's measurements to the chart below. Make sure that you are picking a size bigger than his measurements.
Inseam
WAIST
SHOULDER TO crotch
1(6m)
3"
21"
14"
2(12m)
3.5"
22"
15"
3(18m)
4"
23"
16"
4(24m)
4.5"
24"
17"