Body proportion drawing
The head-unit method is the simplest way to keep a figure in proportion. This guide shows the eight-head canon, the 7.5-head naturalistic figure, and where real bodies usually land.
Start with a head unit
The head is the ruler. Measure the distance from the top of the head to the chin, then use that distance as one unit. Stack the units down the page; the number of units is the figure’s proportion. The classical canon uses eight, the naturalistic adult is usually drawn at seven and a half, and a heroic figure can go to eight and a half.
Drawing the grid first is not cheating. It gives you a scaffold; the gesture, the character and the style come after. Most proportion errors are unit errors, not rendering errors.
The eight-head canon, landmark by landmark
| Landmark | Unit | Note |
|---|---|---|
| Top of head | 0H | Start of the first head |
| Chin | 1H | End of the first head |
| Nipples | ~2H | Approximate; varies with build |
| Navel | ~3H | Approximate; the ribcage ends above it |
| Crotch | 4H | Midpoint of the eight-head figure |
| Knees | ~6H | Between crotch and floor |
| Floor | 8H | End of the eighth head |
| Shoulder width | ~2 heads | Classical male canon; female figures are often narrower. Width, not circumference. |
| Arm length | ~3 heads | Fingertips to shoulder; hanging arm reaches mid-thigh |
7.5, 8 or 8.5?
7.5 heads reads as a naturalistic adult. 8 heads reads as classical or idealised; the extra half-head usually comes from longer legs and a slightly larger chest. 8.5 is the heroic canon used for gods and superheroes. Choose the target before you start; switching mid-way is how figures end up with a long torso and short legs.
What real bodies do
In a 2020 re-analysis of 63,623 men and 1,385 women, mean head height was 0.14 of stature for men and 0.15 for women — about 7.1 and 6.7 heads tall. That is below the 7.5-head drawing convention. Real bodies vary around the canon; the canon is a target, not a measurement.
A six-step construction sequence
- Draw the head unit. Draw one head height at the top of the page. That unit becomes the ruler for the whole figure.
- Mark eight units. Stack eight equal units from the top of the head to the floor. The crotch sits at the fourth unit.
- Place the landmarks. Chin at 1H, nipples around 2H, navel around 3H, crotch at 4H, knees around 6H, floor at 8H.
- Set the shoulders. Shoulder width is about two heads in the classical canon; the waist is narrower than the ribcage and hips.
- Block the legs and arms. Legs are about four heads; arms reach to mid-thigh when hanging. Keep the gesture line before adding detail.
- Adjust to the target. For a naturalistic figure, shorten toward 7.5 heads. For a heroic figure, extend toward 8.5, mostly through the legs and chest.
Common mistakes
- Measuring the head with the hair. Use the bony crown to the chin; hair adds a false half-unit.
- Making the head smaller to make the figure taller. The head unit stays constant; the number of units changes.
- Putting the crotch above or below 4H. In the eight-head canon it is the midpoint; in a 7.5-head figure it shifts slightly.
- Using circumference ratios as drawing widths. A shoulder circumference ratio is not a shoulder-width measurement.
Where the numbers come from
The 7.5/8/8.5 canon is an artistic convention, not a population average. The measured figures come from the 2020 Vitruvian Man re-analysis. The method page lists both, and the head-to-body ratio page covers the measurement in more detail.
Drawing questions
Should I draw 7.5 or 8 heads?
7.5 is the common naturalistic adult proportion. 8 is the classical ideal used for dignity and grandeur; 8.5 is the heroic canon. Neither is more “correct” — they are different stylistic targets.
Where do the head-unit landmarks fall?
In the 8-head canon: the first head ends at the chin, the second around the nipples, the third at the navel, the fourth at the crotch. The legs are about four heads. Real bodies vary, which is why the drawing guide also shows the 7.5-head version.
Sources
- Revisiting Vitruvian Man (2020). Revisiting Leonardo da Vinci’s Vitruvian Man Using Contemporary Measurements. PMC7284298 (2020). https://pmc.ncbi.nlm.nih.gov/articles/PMC7284298/
- Artists Network: 7.5-head figure. Artists Network. Drawing the Proportions of the Human Body. Ameral, 2010. https://www.artistsnetwork.com/art-techniques/drawing-proportions-human-body-ameral/
- Practical Drawing: the eight-head canon. Practical Drawing, Chapter 2 (Wikisource). The classical canon of eight heads and its use in idealised figures. https://en.wikisource.org/wiki/Practical_Drawing/Chapter_2