The name "T-tunic" comes from the garment's resemblance to the letter "T" when laid out on a flat surface. As one of the easiest pieces of garb to make, it is comonly seen as people's first garb. Most theories of historically-correct tunics are based on the Bocksten Bog find - a corpse in the bog was found in 1936, fully clothed. Some cloth had deteriated, but a lot was still there, including a full wool tunic.
What is this? This is The Garbindex - a guide to making garb for recreationists (ie how to sew clothes that will make you look genuinely medieval, when 'playing' with such groups as the SCA, doing LARP - or even making something really genuine for drama.)
Use these resources to find resources that will help you create clothing that looks great - and real!