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 Large - Gray Heather21.529
Adult XL - Gray Heather2330
Adult 2XL - Gray Heather2531
Adult Small - Gray Heather1826
Adult Medium - Gray Heather1927
Adult Large - Gray Heather2229
Adult XL - Gray Heather23.530
Adult 2XL - Gray Heather2531