CHENGYIDA 24 Inch (60cm) Flexible Curve Ruler Flex Design Rule, Ideal for use: engineering drawing, design graphics, garment design, all kinds of painting Draw a perfectly contoured curve without measuringGreat for measuring curved seams and designing curved quilt border patterns metric and imperial double-sided use, soft and pliable measurements can be any shape. Sided ruler is provided with fine ink tank, easy to use. Size:24 Inch (60cm)