How AI Face Analysis Detects Your Face Shape in Seconds

Your face shape quietly influences everything from the haircut that suits you to the glasses that flatter you. For decades, figuring it out meant standing in front of a mirror with a measuring tape. AI face analysis does it in seconds — from a single photo.

What is AI face analysis?

AI face analysis starts by detecting your face in an image, then mapping dozens of facial landmarks — the corners of your eyes, the tip of your nose, the edges of your jawline, the contours of your lips. From these points, the software builds a precise geometric model of your face: its width at the forehead, cheekbones and jaw, its total length, and the angles between key features.

That model is then compared against the classic face-shape archetypes. The whole process — detection, landmark mapping, classification — happens in a fraction of a second on a modern phone.

The six classic face shapes

• Oval — balanced proportions, slightly narrower jaw than forehead. The most versatile shape for hairstyles.
• Round — similar width and length, soft angles, full cheeks.
• Square — strong, defined jawline with a broad forehead.
• Heart — wider forehead tapering to a narrower chin.
• Oblong — longer than it is wide, with a long forehead-to-chin distance.
• Diamond — narrow forehead and jawline with wide, high cheekbones.

Most faces are a blend of two archetypes rather than a perfect match — which is exactly why an algorithmic measurement beats eyeballing it in the mirror.

Why your face shape matters

Knowing your face shape is genuinely practical. It guides hairstyle choices (layers soften a square jaw; volume on top balances a round face), eyewear (angular frames contrast round faces; round frames soften square ones), makeup and contouring (highlighting and shading follow your bone structure), and even beard styling. Stylists have used these principles for years — AI just makes the starting measurement instant and objective.

How Mirlook does it

Mirlook's Face Analysis scans your photo, maps your facial landmarks, and determines your face shape alongside your beauty score, symmetry and golden-ratio measurements. You get the full picture in one scan — not just which archetype you match, but how your proportions compare across every dimension the app measures.