4-piece setOur sewing ruler set contains 4 different types of sewing rulers: comma type curve ruler, triangular scale, sleeve cage ruler, armhole ruler Metric system The sewing ruler uses metric measurements, in centimeters. (1 inch = 2.54 cm). This sewing tool set can meet your necessary drawing and sewing needs Triangular scale The triangular ruler is not in actual centimeters but to allow to change scale Clear scaleThe ruler is made of durable plastic with good flexibility, easy for you to draw pictures on paper Wide ApplicationSewing rulers are widely used for drawing, hand cutting, plate making and other garment designs for students, designers, pattern makers and tailors. The multifunctional sewing ruler is suitable for beginners, tailors, designers, sewing enthusiasts, providing you with convenient drawing, cutting and shaping of various clothing patterns.Specification:Material: PlasticThe package includes:1*comma type curve ruler (suitable for neckline, cuffs, armholes, etc.)1*triangle scale1*sleeve cage ruler1*armhole rulerNote:1. These rules are not great rules, but smaller and more flexible rulers, please confirm the size before purchasing.2. These rulers are thinner and softer, have good toughness, and are more suitable for sewing and sewing than thicker rulers.3. Measures of the triangular ruler are not in actual centimeters, but to allow for scaling.