Big Foot by Lynn Graves, for Free-motion Quilting (high shank) BIG FOOT is a giant darning foot designed to give you more control when free-motion quilting. Drop or cover your feed dogs when using BIG FOOT. The large clear foot makes it easier to follow continuous line quilting patterns offering excellent visibility. You have more contact with the fabric sandwich, giving you better stitch control. Sew at a steady, medium speed. From the center of the "T" shaped slot, it's approximately 1/4" to either end of the "T" slot, providing a guide for echo quilting.