Magnetic seam guide
or 4 fortnightly payments of $0.75 with More info
Are you struggling to sew straight lines and keep your eyes on it all? A Smiley seam guide might help you hone your hand-eye coordination around armholes and necklines as well as simply sewing an even seam allowance.
The seam guides are magnetic and attach to the feed dog plate next to the presser foot.