Bangs sit directly across the forehead — the single fastest way to change a square face's apparent length and upper-face width without committing to a full haircut change. A square face has a broad, angular forehead and a jaw with a defined, often 90-degree-adjacent corner at the hinge. Width stays consistent from temple to jaw rather than tapering, and the chin is flat or minimally curved rather than pointed.
Which Fringe Shape Fits
Which fringe shape fits: Given that this face's forehead reads as "broad and straight across, roughly equal in width to the jaw," the fringe shape that serves soften the jaw's hard corner and add movement at the temples and chin is the one worth requesting — a straight, blunt fringe shortens a long forehead and adds horizontal weight; a soft, side-swept or curtain fringe narrows a wide forehead without fully covering it; wispy, textured fringe adds movement without much line at all.
Where to Be Careful
Where to be careful: Blunt, geometric bobs cut in a straight line at jaw height (this doubles the squareness), angular rectangular frames, and beard lines trimmed in a hard straight edge that echoes the jaw instead of rounding it off.