For my vintage Singer, I bought a 1/4" foot with a built-in edge guide. On my Bernina, I have a 1/4" foot (no guide), but also bought an edge guide that screws into the machine bed. I like that much better. It has a longer guide & I can also adjust the width for when I'm sewing borders or binding, which I do with a 1/2" seam. It was the best $20 I ever spent.