Flat Definer Brush

Filter + Precision Edge Brush

(one of a kind — measured to the sweet spot)

This is not a generic flat definer.

Just like my Angled Eyeliner, this brush was designed as a very specific sweet spot after years of testing brush after brush and seeing the same problems over and over: too wide, too thick, too blunt, too stiff, too fluffy, too big for real eye work.

I measured this Flat Definer to the exact balance I needed for precision + control + refinement — especially on eye shapes where a few millimeters completely change the result.

Why it’s different:

The edge size, thickness, and flat profile are intentionally engineered to create a brush that can:

• place detail with control
• refine edges without over-smudging
• clean and align trajectories
• add precision in small zones without heaviness

It’s a one-of-a-kind size — not a standard factory flat brush.

Why I call it a Filter Brush: 

This brush does more than define. It helps create that filtered eye look by improving:

• edge alignment
• trajectory
• visual lift
• polish
• shape refinement

Sometimes the color is beautiful and the technique is “technically” good… but the eye still looks heavy or droopy because the trajectory is off.

That’s where the Flat Definer changes everything.

What it’s for:

• filtering / refining the edge of the eye look
• correcting trajectory (especially outer corner direction)
• lash line definition
• lower lash line placement
• waterline-area precision
• tight detail work
• brow cleanup/detail
• targeted intensity in small areas

Why it works so well on real eye shapes:

On hooded, deep-set, mature, asymmetrical, or smaller lid-space eyes, oversized detail brushes can make the look heavier or less controlled.

This Flat Definer gives you precision without bulk — so you can refine the shape instead of fighting it.

The difference you feel.

At first glance, it may look simple.

But when you use it, you feel the difference in the scale, edge control, and accuracy.

This is a measured sweet-spot brush — handcrafted with intention, not copied from a standard factory design.