Measurements are approximate and taken while laying flat across the front. Not doubled.
x-small: waist = 11.5"; length = 25"
small: waist = 13"; length = 25"
medium: waist = 14"; length = 26"
large: waist = 15"; length = 27"
x-large: waist = 16"; length = 27"
xx-large: waist = 17.5"; length = 28"