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 - Black 14.523
Junior Medium - Black 15.525
Junior Large - Black 16.525.5
Junior XL - Black 1726