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 18.2527
Adult Medium 20.7527.50
Adult Large 22.5030.25
Adult XL 23.5031
Adult 2XL 25.7533
Adult Small - Black
Adult Medium - Black18.528
Adult Large - Black21.529.5