If you have a diamond-shaped face — wide cheekbones, a narrow forehead, and a pointed chin — both round and square lenses can work, but for different reasons. Round frames soften your angular cheekbones, while square frames add width at the forehead and jaw to balance your proportions. The right pick depends on which feature you want to play up or tone down.
What Makes a Diamond Face Shape Unique?
The diamond face shape is defined by its prominent, wide cheekbones that taper sharply toward a narrow forehead and an equally narrow, pointed chin. It is one of the rarer face shapes, and most generic frame advice does not account for its distinct geometry. Your goal when choosing frames is to add width where the face narrows — at the top and bottom — while avoiding frames that make the cheeks look even broader.
How Do Round Lenses Suit a Diamond Face?
Round lenses are a strong choice for diamond-shaped faces because their curved edges soften the sharpness of wide cheekbones. Circular or oval frames draw the eye away from the midface and create a gentler overall silhouette. They work especially well if your cheekbones are very pronounced and you want a relaxed, understated look. Rimless or thin-metal round frames keep the style modern rather than retro.
How Do Square Lenses Suit a Diamond Face?
Square or rectangular lenses add horizontal visual weight at the brow line, which helps broaden the appearance of a narrow forehead. Frames with a bold, flat top edge — such as classic wayfarers or thick browline styles — are particularly effective. If your chin is very pointed, a square frame with slightly rounded bottom corners gives structure to the lower face without amplifying the pointedness. Square frames also read as bold and confident, making them a popular pick for professional settings.
Round vs Square: A Quick Comparison for Diamond Faces
Round lenses soften prominent cheekbones and suit a casual or artistic style.
Square lenses add width to a narrow forehead and suit professional or structured looks.
Round frames work best when cheekbones are the dominant feature you want to balance.
Square frames work best when forehead narrowness is the feature you want to correct.
Avoid very small frames in either shape — they emphasise the width of the cheekbones by contrast.
Cat-eye and semi-rimless frames are strong third alternatives that also flatter diamond faces.
What Lens Width and Bridge Fit Should You Look For?
Regardless of shape, medium-to-wide frame widths work best for diamond faces. A frame that sits roughly as wide as your cheekbones can look overwhelming; aim for frames that match the width of your forehead or jaw instead. A low-set, narrow bridge helps visually lengthen the nose bridge area, balancing the overall vertical proportion of the face.
Best Frame Styles to Try at Rimloo
At Rimloo, you can filter frames by face shape to shortlist options that are already curated for diamond features. Whether you prefer the softness of round metal frames or the structure of square acetate frames, trying multiple styles through the virtual try-on tool gives you a real sense of proportion before you buy. Start with Rimloo's eyeglasses collection or explore sunglasses to find your ideal match.
