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 - Brown1826
Adult Medium - Brown2028
Adult Large - Brown2129
Adult XL - Brown2430
Adult 2XL - Brown2431.5
Adult 2XL - Brown