This is a Zara model. In your personal pattern ,open the front darts and after sewing them place a bias stripe over them. The same at the back. The sleeves: cut your pattern and add at the central piece at least 2inch, all along, for gathering (use elastic thread at bobbin). TIP: First I sewed the bias alone using the folding bias foot. In order to get a long even stripe. Afterwards I placed it over the sewing dart.