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 - Royal Blue1516
Juvenile 7 - Royal Blue1619.5
Juvenile 5 - Royal Blue1517.5
Juvenile 6 - Royal Blue15.518.5