The Interdimensional Traveler: A Full Body Character Design - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 109

Landmark Head Measure
Lower thigh Head 5
Bony protrusion of knee (tibial tuberosity) Head 6
Lower shin Head 7

Bottom of feet Head 8

Figure 3-5: Here you can see how the total head length of the figure also applies to its arm span.

Understanding proportion allows you to break the rules in an educated way. For example, if you enlarge
the head and hands of a normal-sized figure, the resulting proportion appears adolescent. If you enlarge them
too much, they can start to feel childlike or even overly stylized. Knowing how proportions work allows you
the freedom as an artist to manipulate them. This section will give you the basic information you need to
understand the eight-head proportional canon. For more information on creating a full human figure in the
eight-head canon, see my book ZBrush Digital Sculpting Human Anatomy .