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)
Girls Small (6/7) - Lime Green1218.5
Girls Medium (8-10) - Lime Green1319.5
Girls Large (12-14) - Lime Green14.521.5
Girls XL (16) - Lime Green15.522.5
Girls 5-6 - Lime Green1218
Girls 6X - Lime Green1320
Girls Large (12-14) - Lime Green