This is a 6th-early 7th cen. Frankish-style overgown, in chevron twill linen, edged in violet silk. It's all handsewn.
Next time, I may go the distance and purchase diamond twill. I'll skip the textile border and use a tablet-woven border instead. The arms will be wider. I may pre-treat the fabric with something to distress it and make it soft if it isn't already. My fifteen-year old red-violet tunic is lovely and soft and drapey, but it took years to get that way. Especially with the silk bands on this, I'm going to wash it as little as possible, so it's going to stay pretty stiff.
Related Thought: This would be easy to breastfeed in.