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 - Royal Blue19.528
Adult Medium - Royal Blue2130
Adult Large - Royal Blue23.531
Adult XL - Royal Blue24.532
Adult 2XL - Royal Blue2632
Adult 2XL - Royal Blue