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 - Light Blue Heather1424
Junior Medium - Light Blue Heather14.525
Junior Large - Light Blue Heather1626
Junior XL - Light Blue Heather1627.5