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 - Oxford Grey1826
Adult Medium - Oxford Grey20.528.5
Adult Large - Oxford Grey2230.5
Adult XL - Oxford Grey2532
Adult 2XL - Oxford Grey26.532
Adult 3XL - Oxford Grey2933