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 Yellow Trim1828.5
Adult Medium - Black Body Yellow Trim19.529
Adult Large - Black Body Yellow Trim20.529
Adult XL - Black Body Yellow Trim21.530
Adult 2XL - Black Body Yellow Trim2231