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 - Banana Yellow1525
Junior Medium - Banana Yellow16.525.5
Junior Large - Banana Yellow16.525.5
Junior XL - Banana Yellow18.526