These images can be downloaded and resized either in your computer or on a copy machine to match the height of the sculpt you have in mind.  This makes an easy reference for the distance between joints and body size as a proportion of head size.  Generally the body is between 7 and 8 heads high.  This proportion is often exagerated to create an exotic effect.  In the third image below you can see that the body size is smaller in proportion to the head when the subject is younger.