Measurements are approximate and taken while laying flat across the front. Not doubled.
small: waist = 13"; length = 36"
medium: waist = 14"; length = 36"
large: waist = 16"; length = 37"
x-large: waist = 17"; length = 37"
1X-large: waist = 18"; length = 37"
2X-large: waist = 19"; length = 37"
3X-large: waist = 20"; length = 37"
