Choosing eyewear for a diamond face comes down to one question: does the frame's shape work with or against the face's existing lines? A diamond face narrows at both the forehead and the jaw while flaring dramatically at the cheekbones — the opposite structure of a rectangle. The chin is often pointed, and the temples can appear slightly recessed relative to the cheekbone's width. Aviator Frames — teardrop-shaped lenses, thin metal frame, double bridge, wider at the bottom. — interacts with that geometry in a specific, predictable way.
The Visual Effect
The visual effect: Adds width and softness at the lower face and cheekbone area. On a diamond face, where narrow, often the narrowest of the three width measurements and narrow, tapering to match the forehead's width, this effect either corrects an imbalance or reinforces the face's existing character, depending on which measurement the frame emphasizes.
Why This Pairing Works
Why this pairing makes sense: Soften and add visual width at the forehead and jaw to bring them closer to the cheekbone's width, while avoiding extra volume directly at cheekbone height, which is already the face's widest point. Frames that are faces that narrow toward the jaw and benefit from lower-face width are the ones worth trying first on a diamond face; frames that are faces already wide or heavy at the jawline are worth trying on, but expect a less flattering result without careful sizing.
Sizing It Correctly
Sizing it correctly: The frame width should roughly match your face's widest measurement — for a diamond face that's the cheekbones area. Frames noticeably narrower than that measurement will look pinched; frames noticeably wider will overwhelm the face rather than balancing it.