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 - Navy Blue 17.527
Adult Medium - Navy Blue 19.528
Adult Large - Navy Blue 21.528
Adult XL - Navy Blue 23.530.5
Adult 2XL - Navy Blue 2630.5