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 - Lime Green1827.5
Adult Medium - Lime Green2029
Adult Large - Lime Green2130
Adult XL - Lime Green2430