Clover's Curve Ruler 3pc Set is essential for pattern drafting and garment and fashion design adjustments, a must-have for any sewist who likes to design their own clothes. It is ideal for sewing armholes, necklines, hip lines, or hems. The Clover's Curve Ruler 3pc Set includes a French Curve Ruler, a Hip Curve Ruler, and a Mini Ruler (1" x 6").