These basic 9th-10th Century Tunics are a great all around item.  Unisex, they fit up to a Men's 2X.  Cotton/poly broadcloth.

Check both photos for all of the available tunics.

Numbers 1-3 and 5 have trim edging the front slit and and the sleeve.

Numbers 4-6 have an Infantry Cut, with trimmed side slits that matches the trim at the edge of the neck slit.

The item the model is wearing is number 5.  He's a 2X.