When trying to decide between two sizes, choose the larger size for a better fit.

SizeChestWaistHipsSleeve LengthBody LengthWeight
(in inches)(in inches)(in inches)(in inches)(in inches)(in pounds)
3 Months1515152.511.58 - 12.5
6 Months1818182.7512.512.5 - 16.5
12 Months202020313.520.5 - 24.5
18 Months2222223.2514.524.5 - 27.5
Baby Sizing Chart Diagram