The really large hoop is the top of a quilting frame as I have one like it. It has 2 legs that come down on either side and a cross over piece to stabalize it. The cross piece goes near the floor.r You lift off the top ring (oval) and place you pinned quilt sandwich in the hoop, then tighten the wing nuts to keep the quilt in place while you hand quilt that section. Then do it all over. Move the quilt to an unquilted place and put the top ring back on. They see from $20.00 to $30.00 around here.