Features: and high quality Flexible curve ruler made of PVC materials with built-in metal strips, soft and easy to bend for accurate measurement Scale markings are clear and remain legible over time French curve, also known as a snake ruler or curve ruler, is a drawing tool designed to be highly flexible and can be bent into various curved shapes The snake ruler can be shaped freely without rebounding and features dual-sided measurement scales in both metric and imperial units for versatile measuring needs Measuring tape is suitable for arc and contour measurements, ideal for use in drafting, engineering, construction, surveying, dressmaking, and crafts Specifications: Material: PVC Size: approximately 30 / 40 / 50 / 75 / 90 cm (11.81 / 15.75 / 19.69 / 29.53 / 35.43 inches) Color: Black Note: Please allow 1–2 cm error due to manual measurement Due to differences in monitor displays, the image may not reflect the actual color of the item Package includes: 1 x Curve Ruler