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 - Black17.527
Adult Small - Navy Blue17.527.5
Adult Small - Silver1827
Adult Medium - Black19.528
Adult Medium - Navy Blue19.527.5
Adult Medium - Silver2028
Adult Large - Black2129
Adult Large - Navy Blue21.529.5
Adult Large - Silver2228.5
Adult XL - Black2330
Adult XL - Navy Blue2330.5
Adult XL - Silver23.530
Adult 2XL - Black2631
Adult 2XL - Navy Blue2532
Adult 2XL - Silver2531
Adult 3XL - Black27.532
Adult 3XL - Navy Blue2733
Adult 3XL - Silver2532