YIYATOO 30 Inch (75cm) Flexible Curve Ruler Flex Design Rule, Ideal for use: engineering drawing, design graphics, garment design, all kinds of painting 100% brand new and high quality Exceptionally flexible made of vinyl that will not discolor or decompose with age. . Draw a perfectly contoured curve without measuringGreat for measuring curved seams and designing curved quilt border patterns Adjust quickly from one shape to another. Convenient for dressmaking and other various purposes