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)
Youth Small (6-8) 17.523
Youth Medium (10-12)17.523
Youth Large (14-16) 1825
Youth XL (18-20) 1927
Youth Small (6-8) - Turquoise1722.5
Youth Medium (10-12) - Turquoise
Youth Large (14-16) - Turquoise1926.5