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 - Bright Orange18.526
Adult Medium - Bright Orange2028
Adult Large - Bright Orange21.529
Adult XL - Bright Orange2330
Adult 2XL - Bright Orange2531