You can see the perfect eyebrow shape already in place for this model, showing the three lines being used in her design. Notice when someone shapes the brows correctly, the eyes are framed nicely. If the first thing you notice on someone is their eyebrows, then they're not the right shape.
Another great tool to use to get that perfect shape is The Brow Buddy.
Now, let's get back to our original model's eyebrows. We'll start her designing.