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 Medium - Black1624
Junior Large - Black17.526
Junior XL - Black1826
Junior 2XL - Black20.527