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)
Adult Small - Military Green1625
Adult Medium - Military Green18.529
Adult Large - Military Green2027
Adult XL 2229.50
Adult 2XL - Military Green2532
Adult 3XL 2733.50