What wave pattern is best used to accentuate the face and narrow a round head shape?

The best wave pattern to accentuate the face and narrow a round head shape is a smooth style. Smooth hairstyles create a sleek appearance that elongates the face, counteracting the fullness commonly associated with round head shapes. By minimizing volume around the sides of the head and focusing on a streamlined look, smooth styles help create an illusion of length, drawing attention to the features of the face.

In contrast, curly styles introduce volume, which can emphasize the roundness of the face and may not achieve the desired effect of narrowing. Combination styles may still incorporate some smoothness but tend to include both elements of volume and sleekness, which might not effectively narrow the head shape. Alternating patterns could be visually interesting but do not serve the specific function of elongating the face and reducing the roundness. Therefore, choosing a smooth wave pattern is the most effective approach for this purpose.