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 Blue17.527.5
Adult Small 17.7527.25
Adult Medium - Navy Blue2028.5
Adult Medium 20.2528.50
Adult Large - Navy Blue2229
Adult Large 21.5029.50
Adult XL - Navy Blue23.531
Adult XL 22.7530.50
Adult 2XL - Navy Blue2632
Adult 2XL 26.2531.50
Adult Medium - Navy Blue1828.5