- Size Straight ruler measuring length 15 cm / 6 inches; 45° triangle rulers 7 cm / 2.8 inches; 90° triangle rulers 10 cm / 3.9 inches. - Material and storage PVC rulers that are straight and rollable, capable of bending. They can be placed in a pencil case or on a desk to save space. - Features The protractor measures 0-180° on both sides with a scale accurate to 1 degree for quick, precise measurement. The triangle ruler and right-angle ruler have a recess in the middle to help locate graphic points and draw geometries with different angles. - Applications These soft rulers are suitable for measuring and drawing geometric figures, making them practical and versatile in classrooms, offices and homes. They are useful for artists, designers, architects, technicians and others. - Use scenarios In geometry lessons to measure angles and draw precise figures. In design or art projects to draft layouts with multiple angles. In drafting or architectural planning to quickly measure and lay out plans.