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 - Purple 1827
Adult Medium - Purple 1928
Adult Large - Purple 2129
Adult XL - Purple 22.529.5
Adult 2XL - Purple 2431
Adult 3XL - Purple 26.531
Adult Medium - Purple 18.528
Adult Large - Purple 21.529.5