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 - Banana Yellow1826
Adult Medium - Banana Yellow20.528
Adult Large - Banana Yellow2229.5
Adult XL - Banana Yellow2430
Adult 2XL - Banana Yellow2631