A square face has a strong, angular jaw, a broad forehead of similar width, and a relatively straight hairline — lots of clean lines and corners. The flattering move is to soften rather than reinforce: curved frames take the edge off a powerful jaw and balance the wide forehead, while thinner styles avoid piling weight onto an already-strong structure.
The rule
Soften the strong jaw and forehead with curves. Not sure this is your shape? Check it free first.
Round, oval, and rimless frames, plus classic aviators. Curved edges balance the angular jawline and broad forehead.
Aviator, round, and oval sunglasses.
Round
Softens strong angles and prominent bone structure.
Aviator
Teardrop lens balances a strong jaw; a near-universal classic.
Rimless
Minimal and light — softens angles without adding visual weight.
Avoid: Boxy, square frames with sharp corners — they double up on the face's existing angles.
Square faces have a wide, angular jaw and forehead of similar width, so rounded frames add the contrast that softens them.
Round, oval and rimless frames, plus the classic aviator. Their curves contrast the angular jaw and forehead and make the face look softer and a little longer. Thin or rimless styles add even less visual weight to an already strong structure.
Mostly, yes — boxy frames with sharp corners double up on the angles the face already has and can make the jaw look heavier. If you want a structured look, choose a square frame with softly rounded corners rather than hard right angles.
Aviators and round lenses are the go-to — the teardrop and circular shapes balance a strong jaw. Oversized rounded styles also work well and keep the lower face in proportion.
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