The Gypsy Quilter-Gypsy Quilter Gripper has a comfortable handle, and 2 large suction cups with hand lock and release levers. Simply press the suction cups to any plastic ruler, then flip the levers to lock in place. Will work with smooth surface rulers that are at least 4" wide, including most rectangles, squares and triangle shapes. Measures: 11-3/8" x 3-1/2".