I'm pretty small (although I don't FEEL small! I just feel like ME!) -- 5'2" and wear XS stuff. The Nathan goes right around my waist, not hips. I used it this weekend in a Half and was so glad to have it and not have to worry about gulping stuff down at the hydration stations. Due to gastro problems, I need to take small sips along the way rather than gulping a bunch at a time. I went through two 10 oz. bottles of Perpetuem and one bottle of plain water. I drank the last 10 oz. bottle of water immediately after crossing the finish line. I was able to carry my cell phone in it as well so I could call my hubby to come pick me up after I finished. Very convenient.