Measure around your natural waist (bend sideways – the crease is it) Recommendation: keep one finger between the tape and your body.
Stand with your heels together, and measure around the fullest part of your hips, keeping the tape parallel to the floor.
NO NEED TO SIZE UP!
It's always a temptation to order a larger size, to allow for shrinkage and to provide room for growth. But weve already figured that in. After normal shrinkage from a washer and dryer set on “low”, our clothes will still fit properly, with room for growth spurts.