Features: 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 very flexible and can be bent into various curved shapes The snake ruler can be shaped freely, holds its form without rebounding, and features dual-sided use with both metric and imperial measurements for versatile measuring needs Measuring tape is suitable for arc and contour measurements, ideal for use in drafting, engineering, construction, surveying, dressmaking, crafts, and more Specifications: Material: PVC Size: approx 30/40/50/75/90cm (11.81/15.75/19.69/29.53/35.43 inches) Color: Black Note: Please allow 1-2cm errors due to manual measurement Due to differences between monitor displays, the image may not reflect the actual color of the item Package includes: 1 x Curve Ruler