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 - Red 1828
Adult Medium - Red 2028.5
Adult Large - Red 21.529.5
Adult XL - Red 23.530
Adult 2XL - Red 24.532
Adult 3XL - Red 27.532.5
Adult Medium - Red
Adult Large - Red
Adult XL - Red 23.530