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 - Sky Blue1423
Junior Medium - Sky Blue1525
Junior Large - Sky Blue16.524.5
Junior XL - Sky Blue1725.5
Junior 2XL - Sky Blue17.527
Junior 2XL - Sky Blue