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 - Green Heather14.523
Adult Medium - Green Heather14.525.5
Adult Large - Green Heather16.2526
Junior Small - Green Heather1424
Junior Medium - Green Heather15.526
Junior Large - Green Heather1625.5
Junior XL - Green Heather1627