Package & Size - You will receive 2 pieces of two sizes of serpentine flexible curve ruler, approximately 19 inches and 26.7 inches long, 0.37 inches wide and 0.31 inches thick. The measurable length is about 16 inches and 24 inches (40cm and 60cm). Quality Material - The flexible curve ruler is made of soft plastic material, and there is an inner metal strip for shaping, it can be bent at will and keep its shape during use. Strong and abrasion resistant, not easy to fade, easy to clean, it can be used for a long time. Markable and Plottable - The flexible curve ruler has scales on both sides to help you measure items or draw smooth curves. The double-sided ruler design is easy to read and is a very good tool for plotting and measuring. Easy to Use - The flexible curve ruler has convenient lnking edges for pen and marker use,which can make you easy to use and easy to adjust your desired shape to draw non-circular free curves, saving a lot of time. Wide Application - Plastic flexible curve ruler is suitable for drawing curves, pattern making, measuring length, measuring making clothes, architectural design, woodworking drawing, engineering, mould making and many other uses, it is ideal for woodworking, tailoring, draftsman, craft design.