Pattern drawing based on Gjessing.

A "bog-find" that has been Radio Carbon dated to about 995-1029 CE.
It is made of a 4-shafted twill wool,

And yes, it does look to be this short.

Go to Tunic Page, or Skjoldehamn Site Page 

Some Sources:

Some Clothing of the Middle Ages - Tunics - Skjoldehamn Shirt, by I. Marc Carlson, Copyright 1998.  This code is given for the free exchange of information, provided the Author's Name is included in all future revisions, and no money change hands-