Over-tweezing is the number one eyebrow blunder women make, Anastasia says. To find the perfect place to start tweezing, she says to use your natural eye shape to discover where your eyebrows should begin and end.
By positioning an eyebrow pencil straight up from the middle of your nostril to your eyebrows, you can see the point where the brow should begin. Then, by tilting the pencil on the outside corner of your nose, aligned with the outside corner of your eye, you can find the ending point. Finally, Anastasia says to take a pencil and line it up with the tip of the nose and middle of the eye's iris. The point where it hits the eyebrow is the perfect place for an arch.