A diamond face is defined by a specific set of proportions: Cheekbones are the clear widest point; forehead and jaw are both notably narrower and close in width to each other. 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. That geometry is exactly why the slick back performs as well as it does on this shape — the cut isn't a generic flattering choice, it's a structural match.
Why This Cut Works for Your Face Shape
Why it suits a diamond face: 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. The slick back's placement of volume — none added — hair lies flat against the head from front to back — directly serves that goal. Full forehead exposure and a streamlined, elongated silhouette, and nothing — this style depends on already-balanced forehead proportions. On a diamond face specifically, whose forehead reads as "narrow, often the narrowest of the three width measurements" and whose jaw reads as "narrow, tapering to match the forehead's width," this combination brings the upper and lower face into proportion rather than exaggerating whichever measurement is already largest.
The Mechanics of the Cut
How the slick back is actually cut: Top hair (3+ inches) is combed straight back off the forehead using a high-shine or matte pomade, with sides tapered close and no forward fringe or side part. Volume in this style sits at the none added — hair lies flat against the head from front to back. Daily restyling with pomade; trim every 5 weeks
Confirm You Have a Diamond Face
Confirming you actually have a diamond face first: Measure forehead, cheekbone, and jaw width. On a diamond face, cheekbone width clearly exceeds both forehead and jaw width, while forehead and jaw measurements land close to each other — a silhouette that's genuinely narrow at both ends and wide in the middle.
What to Avoid Instead
What to avoid instead: For a diamond face, steer clear of slicked-back styles with no fringe that leave the narrow forehead fully exposed, and frames sitting exactly at cheekbone width, which visually extends the widest point instead of balancing it. A slick back sidesteps that risk entirely because top hair (3+ inches) is combed straight back off the forehead using a high-shine or matte pomade, with sides tapered close and no forward fringe or side part.
Getting It Right
Getting it right at the barber or salon: Bring a clear photo reference, and specifically ask for volume concentrated at the none added — hair lies flat against the head from front to back — that's the detail that makes this cut work for a diamond face rather than just looking good on a model with different proportions. Daily restyling with pomade; trim every 5 weeks Between appointments, use a light styling product rather than a heavy one; on a diamond face, over-styling volume in the wrong zone can undo the proportional balance this cut is built to create.