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 - Black Body White Trim18.526.5
Adult Medium - Black Body White Trim2027
Adult Large - Black Body White Trim21.527.5
Adult XL - Black Body White Trim22.528
Adult 2XL - Black Body White Trim2429