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 - Black16.526
Adult Medium - Black19.527
Adult Large - Black2028
Adult Large - Brown20.527
Adult XL - Black23.528
Adult XL - Brown2228.5
Adult 2XL - Black2530