Size  Chest Width Body Length (Snap Closed) Sleeve Length Sleeve Opening
6 Months 9.75" 16" 2.25" 3"
12 Months 10.25" 17" 2.75" 3.25"
18 Months 10.75" 18" 3.25" 3.5"
24 Months 11.25" 19" 3.75" 3.75"
Baby Sizing Chart Diagram