If you don't have a 1/4" presser foot but are able to move your needle position, just place a lined index card under your presser foot with the edge touching one of the lines and then lower your needle until it pierces through the next line to the left of the one on the edge of your presser foot. This will be an exact 1/4" seam. Note the setting on your machine after moving the needle so you can write it down for future reference. Hope this also helps.