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 - Gray Heather1421
Junior Medium - Gray Heather1522
Junior Large - Gray Heather16.523
Junior XL - Gray Heather17.525