If you’re not sure what type of shank your sewing machine has, there is a simple way to measure it. First, remove the presser foot and needle plate from your machine. Next, use a ruler to measure the length of the shank from the base of the machine to the top of the screw that holds on the presser foot. If the measurement is less than half, then your machine has a low shank; if it’s more than half inch, then your machine has a high shank.