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 Blue1927
Adult Medium - Navy Blue2029.5
Adult Large - Navy Blue21.530
Adult XL - Navy Blue23.530.5
Adult 2XL - Navy Blue25.531.5