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 5-6 - Royal Blue1719.5
Juvenile 5-6 - White15.516.5
Juvenile 7 - White16.518.5
Toddler 2T - Navy Blue1314
Toddler 2T - Royal Blue12.514.5
Toddler 2T - White1314.5
Toddler 3T - Navy Blue1316
Toddler 3T - Royal Blue1316
Toddler 3T - White13.514.5
Toddler 4T - Navy Blue1517
Toddler 4T - White1417