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 - Navy Blue1826
Adult Medium - Navy Blue19.528
Adult Large - Navy Blue21.529
Adult XL - Navy Blue23.530
Adult 2XL - Navy Blue2530.5