Measurements are approximate and taken while laying flat across the front. Not doubled.
x-small: waist = 13"; length = 36"
small: waist = 14"; length = 36"
medium: waist = 15"; length = 37"
large: waist = 16"; length = 38"
x-large: waist = 17"; length = 38"
xx-large: waist = 18"; length = 38"