For square-shaped faces, use curved frames to soften ... Once you determine your face's shape, you'll want to decide which frame complements it the best. Here are the best fits for each type ...

The collection features a variety of glasses shapes that are tailored ... Instead, opt for round or oval frames that soften the angles of a square face and add a touch of femininity or masculinity ...

In particular, EyeBuyDirect says that rectangular and square frames compliment oval faces the best. This is because they're all-around even, meaning they can pull off other styles, like cat-eye, round ...