There is one rule underneath all face-shape advice: contrast wins. A frame that opposes the dominant line of your face balances it. A frame that repeats that line exaggerates it. Everything below is an application of that single idea.
You do not need to measure anything. Look in a mirror and ask which is more true of your face — is it mostly soft curves, or mostly straight lines and angles? That answer gets you most of the way there.
Round faces
A round face has soft edges, similar width and length, and fullness through the cheeks. It needs structure, which means angles.
Choose: square and rectangular frames. The straight top line introduces a horizontal the face does not have, which makes it read longer and more defined. The Brunico rectangle is the safe everyday version; Corvara is the same idea with much heavier proportions.
Also works: cat-eye frames. The upswept outer corner lifts the eye line and draws attention away from the width of the cheek.
Be careful with: small round frames, which repeat the shape you already have.
Square faces
A square face has a strong jaw, a broad forehead and defined angles. It needs softening.
Choose: round and oval frames. The curve does the opposite of your jawline and takes the hardness out of it. The slim Canazei oval is the lightest-touch option; Moena goes fully round.
Also works: rimless frames. With no frame outline at all, there is nothing to add more angles to the face.
Be careful with: heavy square frames, which stack angle on angle.
Oval faces
An oval face is balanced — slightly longer than it is wide, with no single dominant feature. This is the easiest shape to dress, because almost nothing fights it.
Choose: more or less anything. Use the freedom to pick on character rather than correction. If you want the frame noticed, go to statement and oversized; if you want it invisible, rimless.
Be careful with: frames much wider than your face, which are the one thing that can unbalance an oval.
Heart-shaped faces
A heart-shaped face is wider at the forehead and narrows to the chin. The goal is to avoid adding more weight up top.
Choose: cat-eye or navigator and aviator shapes. Both are wider at the bottom or taper outward, which balances a narrower chin.
Also works: round frames, which soften a pointed chin.
Be careful with: top-heavy frames with a thick brow bar.
Two things that matter more than shape
Width. A frame should be roughly as wide as the widest part of your face. Too narrow and it pinches; too wide and it slides. This matters more than getting the shape theoretically perfect.
Where the eye sits. Your eye should sit near the centre of the lens, not crowded into the top or the inner corner. If it does not, the frame is the wrong size for you regardless of shape.
The honest caveat
These are starting points, not rules. Plenty of people look best in the frame they were told to avoid, because face shape is only one input alongside colouring, hair, height and what you actually like wearing. If a pair feels right when you put it on, that beats any guide.
Every GRIPZ frame ships across Egypt in 1–3 business days to Cairo and Giza, and returns are accepted within 14 days on unworn frames — so trying a shape you are unsure about costs you nothing but the trip back.