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 Grey1525
Junior Medium - Oxford Grey16.525.5
Junior Large - Oxford Grey17.526.5
Junior XL - Oxford Grey1927.5