Measure waist size where you typically wear your pants, please keep the tape comfortably loose. Waist size (inches) Small: 25 - 27 Medium: 27 - 29 Large: 29 - 31 X-large: 31 - 33 Stand with your heels together and measure around the fullest part of your hips. Hip size (inches) Small: 36 - 38 Medium: 38 - 40 Large: 40 - 42 X-Large: 42 -44