The size and shape of the chin should align harmoniously with the proportions of the entire face. For example, a well-proportioned chin should ideally be in balance with the width and length of the nose, the position of the eyes, and the contours of the cheeks and jawline. Deviations from these ideal proportions can result in a lack of facial balance and harmony.

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The chin's position in relation to the forehead, nose, and lips creates the overall facial profile. In a balanced profile, the chin should neither protrude excessively nor recede too far back in relation to the other facial structures. A weak chin may create an imbalance, while an overly prominent chin can also disrupt facial harmony.