My pattern states it this way: (RS) bind off all sts purlwise. Maybe it is to achieve a special look. It is a little dress, size 3/4, that has a bell ruffle and is shaped like an "A" line dress, kind of like a tunic. It started out on circular needles/stockinette stitch from the bottom up. You then decrease stitches and eventually go to straight needles to shape the armholes. At the top, the last row just ends and you can attach I cords for ties or ribbons. It is the last row that has me confused.