If you've ever read Seventeen, you will know that Reese Witherspoon has a heart-shaped face, and that drawing around your reflection in a mirror is the best way to identify your own. But if, like us, you've realized that the smeary outline has never looked human or proved helpful, don't worry! Thankfully, no one's face is a perfect circle or square. The trick to figuring out your face shape—round, square, oval, or heart—is simply to know a few key traits. Here is our guide to reading the signs and choosing the perfect pair to complement your face, whatever the shape, without messing up your home furnishings.

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