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 - Black 1826.5
Adult Medium - Black 2028.5
Adult Large - Black 21.528
Adult XL - Black 23.530.5
Adult 2XL - Black 2630.5
Adult 3XL - Black 2632.5