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

Numbers 1-3 have an Infantry Cut, with trimmed side slits that matches the trim at the edge of the sleeve.

Number 4 has Wide trim down the front and and edging the sleeve.

The item the model is wearing is an example of the general style and fit.  He's a 2X.