Sunglasses that work best on a diamond-shaped face add width to the forehead, soften strong cheekbones, and balance a narrow chin while still giving full UV
protection to your eyes.​

• Browline and cat-eye sunglasses are ideal to balance high cheekbones and a narrow chin.​​
• Oval and rectangle frames soften angles and add structure without overwhelming your features.​​
• Pilot (aviator-style) sunglasses draw attention to the upper half of the face and complement diamond shapes.​​

• Narrow forehead and chin, with cheekbones as the widest part of the face.​​
• Defined or angular jawline and pointed chin that create a diamond or triangular outline when viewed from the front.​​

• Use a soft measuring tape or ruler to measure vertically from your hairline to the tip of your chin.
• Measure horizontally from cheekbone to cheekbone at their most prominent point.
• If the cheekbone width is greater than your forehead width and jawline width, you likely have a diamond-shaped face.​​

• Pull hair away from your face and trace the outline of your face in the mirror with a washable product (for example, a makeup pencil).
• Look for a narrow upper face, widest section at the cheeks, and tapering down to a slim, sometimes pointed chin.

If this outline resembles a diamond, the frame tips in this guide will be tailored to your features.​​

• Add width and visual interest to the upper half of your face (brow line and temples).
• Soften strong or angular cheekbones without hiding them completely.
• Balance the narrow chin so your features look harmonious overall.​

• Medium to slightly oversized lenses (avoid very tiny or very narrow frames that exaggerate angles).​
• Top‑heavy designs, such as thicker upper rims, semi‑rimless frames, or decorative brow bars, to visually broaden the forehead.
• Soft curves or gently rounded corners to contrast sharper jawlines.

Browline sunglasses feature a thicker upper rim and a thinner lower rim, naturally pulling attention to your eyes and forehead.​​

• Why they flatter diamond faces: The bold top line broadens the upper face and balances wider cheekbones.
• Best details to choose: Medium lens height, darker or contrasting top bar colors, subtle lower rims for a light look.
• Styling idea: Pair browline frames with everyday outfits when you want a polished, put‑together look that still feels casual.​

Cat‑eye sunglasses have upswept outer corners that visually lift the face.​​

• Why they flatter diamond faces: The upswept shape softens strong cheekbones and brings balance to a narrow chin for a more lifted appearance.​​
• Best details to choose: Thicker temples, decorative corners, and top‑heavy designs that widen the upper third of the face.​​
• Styling idea: Choose tortoise or bold color cat‑eyes when you want a playful, feminine and fashion‑forward frame for weekends or events.​

Oval sunglasses offer rounded edges that gently contrast a sharper jawline.​​

• Why they flatter diamond faces: The smooth curves soften angular features and help your face look more proportional from forehead to chin.​​
• Best details to choose: Medium or slightly oversized lenses, thin or mid‑weight rims, and neutral colors if you prefer a minimalist style.
• Styling idea: Use oval frames as your go‑to everyday pair that can easily be dressed up or down.​​

Rectangle sunglasses create a structured, modern look with straight lines and defined corners.​

• Why they flatter diamond faces: The horizontal emphasis adds balance across the face and can make cheekbones look more refined rather than overly sharp.​​
• Best details to choose: Medium‑sized rectangles with softened or slightly rounded corners, minimalist designs when you want a classic look, bolder colors when you want more impact.
• Styling idea: Rectangular frames pair well with tailored outfits or athleisure when you want a clean, modern edge.​

Pilot sunglasses feature tear‑drop‑shaped lenses and slim metal frames.​​

• Why they flatter diamond faces: The wider top and curved bottom balance the cheekbones and draw attention upward toward your eyes.​​
• Best details to choose: Classic metal brow bars, adjustable nose pads for comfort, and gradient lenses for a softer look.
• Styling idea: Pilot frames are perfect when you want a slightly edgy, cool aesthetic that still feels timeless.​​

• Long‑term exposure to ultraviolet rays can increase the risk of eye conditions like cataracts and can damage the delicate skin around the eyes.​​
• Lenses with 100% UVA and UVB protection help block these rays and are considered the gold standard for everyday sun safety.​​
• Foster Grant sunglasses are designed with full UV protection so you can focus on style without sacrificing eye health.

• Polarized sunglasses reduce glare from reflective surfaces such as water, snow, and pavement, making outdoor activities more comfortable.​
• This technology can improve contrast and clarity, which is especially helpful for driving, beach days, or sports.
• If you spend a lot of time outside, consider adding polarized lenses to any of the frame shapes recommended for diamond faces.​

• The bridge should rest comfortably on your nose without sliding down or pinching.​​
• Temples should sit snugly behind your ears without pressing or leaving marks.
• The frames should sit close enough to your face to block sunlight but not touch your eyelashes.

• Frequent slipping down your nose even after minor adjustments.​
• Pressure points behind the ears or around the nose that cause discomfort or headaches.​​
• Lenses sitting too high or too low so that your eyes are outside the optical center of the frame.​

1. Start with your style goal (classic, trendy, sporty) and pick a frame family that matches it, such as browline for classic or cat‑eye for trendy.​​
2. Narrow your choices by prioritizing frames that are slightly wider at the brow than at the chin area.
3. Choose lenses with 100% UVA‑UVB protection and consider polarized options if you spend a lot of time outdoors.
4. Try different sizes and temple lengths to ensure the frames sit comfortably and stay in place during daily wear.​​

• For work days, reach for neutral browline or oval frames that complement most outfits.
• For weekends and vacations, experiment with colorful cat‑eyes, bold rectangles, or mirrored pilot lenses to highlight your cheekbones.​​
• If you prefer a minimalist wardrobe, stick to black, tortoise, or soft metal tones that you can mix and match with any look.

• The Foster Grant frame finder lets you filter by style, lens features, and face shape to match you with flattering frames for diamond faces.​​
• Answer a few quick questions, then explore suggested browline, cat‑eye, oval, rectangle, and pilot frames that suit your preferences.

Foster Grant Frame Finder.

• Visit the Foster Grant sunglasses collection page to see the full range of men’s and women’s sunglasses with 100% UV protection.
• Read the article on sunglass lens technology to understand coatings, blue light filtering, and other performance features that can elevate your next pair.​

Many people with diamond-shaped faces find that browline and cat‑eye frames are especially flattering because they broaden the upper face and balance strong cheekbones.​

Very narrow frames and styles that are significantly smaller than your cheekbone width can make your features look sharper and less balanced, so medium or slightly
oversized frames are usually a better choice.

Polarized lenses are not specific to face shape, but they are a smart choice for anyone who wants to reduce glare and improve visual comfort during outdoor activities.​