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 - Purple 17.527.5
Adult Medium - Purple 2027.5
Adult Large - Purple 2129.5
Adult XL - Purple 23.531.5
Adult 2XL - Purple 25.531