Measurements are approximate and taken while laying flat across the front. Not doubled.
small: bust = 19.5"; length = 34"
medium: bust = 20.5"; length = 35"
large: bust = 21.5"; length = 36"
x-large: bust = 24.5"; length = 37.5"
xx-large: bust = 26"; length = 38"
xxx-large: bust = 27"; length = 38"
