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 1827
Adult Medium - Black 2029
Adult Large - Black 21.528.5
Adult XL - Black 2430.5
Adult 2XL - Black 26.531