The graph shows the original giant on the left, and your scaled giant on the right, with the eyes, mouth, and sword scaled as you left them on the last screen. Oh biscuits. Marcellus's mouth isn't proportional. Here's why:

You made Marcellus 3 times as tall as Dan but you dragged Marcellus’s mouth to be 5.46 times as wide as Dan’s mouth. A proportional giant would have the same multiple for both.

If Dan's mouth is 4 cm wide, how many centimeters wide should Marcellus's mouth be?