I think the waist measurement is a moody thing. Is your waist bloated at all? Did you eat salty food leading up to your measurement? If I do, my waist measurement is higher. Honestly, I hate measuring my waist because it can change daily (not that I measure daily), so my reading all depends on if I'm bloated at all or not. And, if I measured in the morning once, I better remeasure in the morning to be as accurate as possible because by the end of the day, my waist is much larger...just like my weight goes up at the end of the day.