Since round faces have no sharp angles, a set of arched brows can add some definition. “[An arch] gives you more geometry in your face,” Healy says, and you can create a soft, medium, or high peak—whatever you feel most comfortable with. If you do opt for a high, high arch, play with caution—a sharp peak can border on triangular.
As for how to find your natural peak, take this tip from makeup artist Riku Campo: Use an eyebrow brush or pencil as a measuring tool and place it on the side of your nose. “Point it diagonally from your nostril to the outside edge of your iris: This is where your brows should arch.”