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 - Black1524
Junior Medium - Black1725
Junior Large - Black1827
Junior XL - Black1928
Junior 2XL - Black2029.5