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 1525
Junior Medium 1627
Junior Large 1726
Junior XL 1828
Junior 2XL
Junior 3XL