Width is measured across the chest below the sleeves from seam to seam. Height is measured from the bottom of the shirt to the highest point on the shoulder (where the seam meets the neck).

Please note that each product has its own specific sizing chart.
SizeWidth (inches)Height (inches)
Juvenile 4 - Navy Blue13.517
Juvenile 5-6 - Navy Blue14.519.5
Juvenile 7 - Navy Blue15.519.5
Toddler 2T - Navy Blue1215
Toddler 3T - Navy Blue12.516
Toddler 4T - Navy Blue1416.5