Face shape notes before a paper mask fitting

EmmaroX

While preparing a glossary for new illustrators, I ran into a disagreement about how to explain the basic face outline categories. Some entries offer only a category name, while others mix several visible features into paragraphs that are difficult to compare. A reference about determining face shape might help us decide which observations belong in each entry. I would like every definition to follow the same order, moving from overall length and width to the outline of the jaw. That would let readers compare descriptions directly, rather than assume that a single distinctive feature settles the classification for every face. There should probably be a note about intermediate outlines so readers understand why some examples do not match one description exactly. A set of similarly scaled outline drawings seems useful, especially if hair does not hide the edges that each definition describes. We want neutral descriptions that support observation, without presenting a particular outline as the standard that every portrait should follow. How would you keep these entries concise while still giving beginners enough information to compare the outline categories on their own?