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 - Black1826
Adult Medium - Black1929.5
Adult Large - Black2128.5
Adult XL - Black2331
Adult 2XL - Black2531
Adult 3XL - Black2730.5