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 - Denim Blue17.527.5
Adult Medium - Denim Blue1928.5
Adult Large - Denim Blue20.531
Adult XL - Denim Blue22.531
Adult 2XL - Denim Blue2431.5