Material: The ruler is made of plastic material, which is clear, , high accuracy, good flexibility. It's easy for us to draw pictures on paper. Advantage: Line detail and clear, high accuracy, is the tool for manual cutting plate making. Widely used, suitable for drawing, cutting, plate and other DIY clothing design. Measurement Unit: Metric measurements. (1 Inch = 2.54 cm). This is one of the most commonly used professional clothing curve feet. Built-in lines and toughness super good, transparent ruler, scale clear. Widely Usage: Suitable for drawing, cutting, plate and other clothing design, great dressmaking template tools for artists, students, designers, pattern makers and tailors. This french curve ruler is designed to fit and cover all parts of making or cutting sewing pattern. This invaluable tool for dressmaking, helps you alter patterns for your personal fit. It has a combinations of curves for necks, armholes, waistbands, sleeve. Great to use when tracing patterns, a shaping rulers. Color: Clear + Red Package Contents: 4 x Comma ruler(length 30cm) 4 x Triangle ruler(length 22cm) 4 x 6401 multifunctional ruler(length 26cm) 4 x 6460 half round ruler(length 25.5cm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.