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 - Carolina Blue13.517.5
Juvenile 5-6 - Carolina Blue14.519
Juvenile 7 - Carolina Blue1620.5