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.

Size Width (inches) Height (inches) Adult Small - Black 18 27.5 Adult Small - White 17.5 27.5 Adult Medium - Black 20 28 Adult Medium - White 20 28 Adult Large - Black 21.5 29 Adult Large - White 22 29.5 Adult XL - Black 22.5 30.5 Adult XL - White 23.5 31 Adult 2XL - Black 25 30 Adult 2XL - White 25.5 32 Adult XL - White