Unsure about which size to get? Keep in mind that Onzie gear is made from a fantastically stretchy material and acts as a “second skin” that is meant to be tight. As you work out, sweat and continue to be active while wearing Onzie gear, our products will stretch with you and form to your specific body. Every woman has her own preference and we believe you should stay true to your body. If you prefer a tighter waist band, we suggest trying the smaller size. However if a looser fit suits you better, try out the bigger size!