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 Orange1826.5
Adult Medium - Bright Orange19.528.5
Adult Large - Bright Orange21.530
Adult XL - Bright Orange2431
Adult 2XL - Bright Orange2532
Adult 3XL - Bright Orange2833