Measurements are approximate and taken while laying flat across the front. Not doubled.
small: bust = 18"; waist = 18"; length = 38.5"
medium: bust = 19"; waist = 19"; length = 38.5"
large: bust = 20.5"; waist = 20"; length = 38.5"
x-large: bust = 21"; waist = 21"; length = 39.5"