One dominant point with a deficit either side of it defines the styling problem. The aim is to broaden the upper and lower thirds so the mid-face peak becomes one strong feature inside a balanced outline rather than the only thing the eye catches.
Top width is the stronger lever. Side-swept bangs, textured bangs with lift, and volume built at the temple all broaden the narrow upper third. This runs directly opposite to heart advice, which is the practical reason the two shapes have to be told apart before anyone picks up scissors.
Jaw width is the second lever. Chin-length and collarbone-length cuts with movement at the ends, waves that expand below the cheekbone, and facial hair grown fuller along the mandible all fill the lower deficit. Styles pulled tight at ear level accentuate the peak instead.
Exposure is the third consideration. Sweeping everything back removes every softening element at once and leaves the peak fully exposed, so keeping some softness at the temple usually reads better.
An outline widest at the cheekbones and pinched at both the forehead and the jaw is what the rarest classification measures. Five table rows set the relative widths. Side lighting plus a top-to-bottom read returns the low-high-low sequence, and the hollow under the arch confirms it. Heart is separated at the forehead, oval by the same measurement, oblong by whether the outline is a column or a rhombus. Hair, weight, age and lens distance each flatten or exaggerate the peak. Styling then adds width above and below it, the reverse of what a heart face needs.
Get the classification right before the haircut. The face shape detector measures forehead, cheekbone and jaw spans from 468 landmark points in your browser, uploads no photo, and reports which line is widest.