To calculate your waist circumference, use a tape measure. Start at the top of the hip bone, and wrap it around your waist at navel level. Ensure that it’s not too tight and that the tape is parallel with the floor. Don’t hold your breath while doing it.

Stand sideways to a mirror and identify the fullest part of your hips. Wrap a tape measure around your widest area. The tape measure should be loose enough so that there is no skin depression. Record the measurement where the tape measure meets its end.