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 Blue17.526.5
Adult Medium - Denim Blue19.528
Adult Large - Denim Blue2129.5
Adult XL - Denim Blue22.530.5
Adult 2XL - Denim Blue2532
Adult 3XL - Denim Blue27.531