Measurements are approximate and taken while laying flat across the front. Not doubled.
small: bust = 16.5"; length = 54"
medium: bust = 17.5"; length = 54.5"
large: bust = 18.5"; length = 55"
x-large: bust = 21"; length = 56"
xx-large: bust = 23"; length = 56"
xxx-large: bust = 25"; length = 56"