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 - Light Blue1829
Adult Medium - Light Blue19.528.5
Adult Large - Light Blue2231
Adult XL - Light Blue23.531.5
Adult 2XL - Light Blue25.533
Adult XL - Light Blue
Adult 2XL - Light Blue