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 - Charcoal 1727
Adult Medium - Charcoal 19.528
Adult Large - Charcoal 21.529.5
Adult XL - Charcoal 23.530
Adult 2XL - Charcoal 2531