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 - Green Heather14.524
Junior Medium - Green Heather1525
Junior Large - Green Heather1625.5
Junior XL - Green Heather1628