Stand upright and relax your abdomen
Use a soft measuring tape
Find the natural waistline, usually above the belly button and below the rib cage
Wrap the tape around your waist at that point
Keep the tape level all the way around
Make sure the tape is snug but not tight
Do not suck in your stomach
Breathe normally
Read the measurement at the point where the tape meets
Measure in inches or centimeters
Repeat the measurement once or twice for accuracy