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)
Junior Small - Oxford Grey13.526
Junior Medium - Oxford Grey14.525.5
Junior Large - Oxford Grey14.526.5
Junior XL - Oxford Grey16.527.5