Take your straight line and put it beside your nose . Where that lines up should be where your eyebrow starts. Like shown.
Turn your straight line slightly to the center of your pupil . Where they intersect should be where your eyebrow arches.
Now turn your straight line to the end of your eyeball, that is where your eyebrow should end
SEE MY "elongated eye" video on how to do your makeup like one of my eyes are done here haha
- A straight edge (ruler or pencil)