The scarf is made in sections positioned inside the border. The border and the sectioned middle part are knit all at once, without interruptions. Since for the middle part you will add the stitches on one side of the scarf and decrease stitches on the other side every other row, the ends of the scarf are not going to be square, but have a fluid wave. Gauge is not of crucial importance for this project. You can adjust the length of this scarf as desired.