Facial Proportions| Generally, in most anime that people are commonly interested in, is the style that have the exaggerated sized eyes, and lightly defined nose, mouth, and brows. If you're going to draw in that style, understand that the eyes take up 3/4 of the facial space, leaving 1/4 for the nose and mouth. Sometimes, the proportions become even smaller to 1/8 in 'overly exaggerated' styles. Whatever the case, try mixing and matching with various styles until you develop your own that you're comfortable with!