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This probably isn’t the news you want to hear during the holidays.

If you’re looking to lose some weight to “look better” in your holiday outfit, you may have to lose more than you think.

Researchers at the University of Toronto figured out the amount of weight a person needs to gain or lose before others notice and how much they need to gain or lose to appear more attractive to others.

“Women and men of average height need to gain or lose about … eight and nine pounds, respectively, for anyone to see it in their face,” according to researcher Nicholas Rule. “But they need to lose about twice as much for anyone to find them more attractive.”

The study found the average weight decrease to make faces in the study appear more attractive was about 14 pounds for women and 18 pounds for men of average height.