There's a simple approach - one that I first learned and is great for beginners.

Then there is the more complex approach using illustrator, Andrew Loomis' guidelines.

Once I became aware of this proportion, it seemed like such an obvious measurement to notice.

This is a perfect example of how easy it is for these so-called "more obvious" elements to become lost in the complexities of the face.

Every time you learn an element of head construction, it will be that much easier to notice it the next time you observe your subject.

Proportion refers to the relationship in size and placement between one object and another.

There are many formulas that one can adapt to draw the facial features in the correct location.

facethis.blogspot.com/2012/01/perfect-face-golden-ratio-beaut… Measuring Facial Perfection – The Golden Ratio – During the European Renaissance, renowned artists and architects used an equation known as the “golden ratio” to map out their masterpieces.

Thousands of years later, scientists adopted this mathematical formula to help explain why some people are considered beautiful…and others are not. The Math Behind the Beauty – Interactive Mathematics – Learn …

Every time you learn an element of head construction, it will be that much easier to notice it the next time you observe your subject.Proportion refers to the relationship in size and placement between one object and another.There are many formulas that one can adapt to draw the facial features in the correct location.facethis.blogspot.com/2012/01/perfect-face-golden-ratio-beaut… Measuring Facial Perfection – The Golden Ratio – During the European Renaissance, renowned artists and architects used an equation known as the “golden ratio” to map out their masterpieces.Thousands of years later, scientists adopted this mathematical formula to help explain why some people are considered beautiful…and others are not. The Math Behind the Beauty – Interactive Mathematics – Learn …This tutorial shows you how to master the use of proprortions.