Unit
- Facial thirds rule: The adult face can be divided into three equal horizontal sections: from hairline to brow line, brow line to base of nose, and base of nose to chin. These thirds provide a reliable starting point for placing features. Variations exist due to age, ethnicity, and individual anatomy, but the thirds rule serves as a foundational proportional guideline.
- Eye placement and spacing: The eyes are positioned approximately halfway between the top of the head and the chin. The width of one eye typically fits between the two eyes. The outer edges of the nostrils align vertically with the inner corners of the eyes. These alignments help ensure symmetrical placement.
- Mouth and chin relationships: The corners of the mouth align with the center of each eye when the face is at rest. The lower lip sits halfway between the nose and the chin. The philtrum (vertical groove) connects the nose center to the cupid bow of the upper lip.
- Ear positioning: The top of the ear aligns with the brow line, and the bottom aligns with the base of the nose. The ear sits slightly behind the midline of the head when viewed from the side. Its angle roughly parallels the angle of the jawline.
- Head as an egg shape: Beginning artists benefit from visualizing the head as an elongated egg shape, with the narrower end at the chin. This simplifies initial blocking-in before refining contours. The widest part of the egg corresponds to the cheekbone area.
- Proportion variations in profile: In a side view, the ear sits between the brow line and nose base. The eye appears as a triangular shape, narrower at the outer corner. The lips project forward, with the upper lip slightly protruding beyond the lower lip in a neutral expression.
- Using comparative measurement: Hold your pencil at arm length and measure one feature (like the eye) against another (like the ear length) to check proportions. This technique trains your eye to see relationships rather than isolated details, preventing disproportionate features.
- Age adjustments: In children, the forehead is proportionally larger, eyes are lower on the face, and features are smaller relative to the head size. In older adults, the ears and nose appear larger due to continued growth, and the lips become thinner with less elasticity.
Design Principle
Principle: Proportion as a Grid System
Definition: Proportion in portrait drawing operates like a modular grid where each facial feature occupies a specific ratio relative to the whole head. The grid helps maintain consistent relationships across different viewpoints and expressions.
Application: When drawing a front-view portrait, lightly sketch horizontal lines at hairline, brow, nose base, and chin. Then add vertical centerline and eye-line. Mark eye widths and nose width using the eye-width unit. This grid prevents common mistakes like eyes too high or mouth off-center. After blocking, refine shapes within the grid.
Quick Revision
- The face divides into three equal horizontal thirds: hairline to brow, brow to nose base, nose base to chin.
- Eyes sit at the vertical midpoint of the head; one eye width fits between the eyes.
- The mouth corners align with the center of each eye when the face is relaxed.
- Ears span from brow line to nose base and sit behind the midline in profile.
- Comparative measurement using a pencil helps train proportional seeing.