Have you ever tried on a pair of sunglasses that look perfect on someone else, but just don't "work" on you? It's not about taste; it's about proportions. The shape of the frame and the shape of your face should complement each other, not repeat each other.
The good news: once you know your face shape, choosing becomes simple. Here is the complete guide.
How to determine your face shape
Stand in front of a mirror, pull your hair back, and look at your general outline:
- Round face — width and length are roughly equal, lines are curved with no sharp angles, cheeks are the widest area
- Square face — the jawline is strong and angular, the forehead is as wide as the jaw
- Oval face — length is noticeably greater than width, chin is slightly rounded, considered a "balanced" shape from the start
- Heart-shaped face — the forehead is the widest area, the chin is narrow and slightly pointed
- Elongated/Rectangular face — similar to oval, but with straighter lines on the sides and a high forehead
Round face → frames with angles
If you have a round face, the goal is to add structure that your face lacks naturally. Round or oval frames accentuate roundness instead of balancing it.
What works: square, rectangular, or cat-eye frames with clean lines. Sharp corners create the illusion of length and define the cheekbones.
What to avoid: small, round frames that get lost in the facial contours and accentuate general roundness.
Square face → rounded frames
This is the opposite situation: you already have strong angles from your jaw and forehead, so square frames double down on the harshness of the lines.
What works: round or oval frames, which contrast with natural angles and bring visual balance. Cat eyes with slightly curved lines work excellently — they maintain elegance without being too soft.
What to avoid: rectangular frames with sharp corners, which accentuate the jaw.
Oval face → almost any shape
An oval face is considered the "universal" shape — the proportions are already balanced, so you have great freedom of choice.
What works: aviator, cat eyes, round, square — basically any shape well-proportioned to the width of the face. The only rule: avoid overly large frames, which can throw off naturally good proportions.
Heart-shaped face → frames that balance the base
With a wide forehead and narrow chin, the goal is to add visual weight to the bottom of the face and reduce the emphasis on the forehead.
What works: aviator frames (the wider base at the bottom helps), or round/oval frames with delicate lines that don't add volume to the brow area.
What to avoid: highly pronounced cat-eye frames, which draw attention to the top of the face, exactly the area that is already dominant.
Elongated face → frames with volume, not height
When the face is noticeably longer than it is wide, the goal is to visually "shorten" the proportions, not accentuate them.
What works: larger, square, or round frames with good width and a low bridge — this breaks up the vertical line of the face. Decorative frames with details on the sides also help.
What to avoid: narrow, small frames, which elongate the face even more.
A principle that always works, regardless of shape
Beyond the frame shape, keep in mind one thing that many ignore: lens quality matters just as much as frame shape. A perfectly chosen frame, but with lenses lacking real UV protection, still forces your eyes to work harder in the sun — the pupil dilates in the false shade created by the tinted lens, but UV rays still reach the retina.
That's why at ACEBER every model, regardless of shape, has certified UV400 lenses. Choose the frame for your face, the rest is already taken care of.
Discover the ACEBER collection
In the ACEBER collection, you can find cat-eye, round, and aviator models designed for every face shape, with certified UV400 lenses and Italian acetate frames.
Choose your pair →
