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 - Black17.527
Adult Small - Charcoal1827
Adult Medium - Black2028
Adult Medium - Charcoal2028.5
Adult Large - Black2229.5
Adult Large - Charcoal2129.5
Adult XL - Black23.530
Adult XL - Charcoal2330
Adult 2XL - Black2532.5
Adult 2XL - Charcoal2532
Adult 3XL - Black2731.5
Adult 3XL - Charcoal2732.5