Features: Flexible curve ruler made of PVC materials with built-in metal pieces, soft and easy to bend for accurate measurement Scale is clear and remains 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 Ruler can be shaped freely without rebounding; double-sided use with metric and imperial scales 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 picture may not reflect the actual color of the item Package includes: 1x Curve Ruler