Features: High-quality materials: Geometric drawing templates are made of high-quality plastic, durable and lightweight, different shapes allow you to draw different patterns you want, wonderful practical drawing tools. Wide application: Geometric rulers are ideal for art design, fractional measurement, building formwork, architecture, network engineering and drawing templates in school, office, home. Great help for students and children. Ruler measurement: Adopt the metric system, use centimeters as the scale unit, the smallest accuracy is 1 mm. Drawing templates vary in size. Great gift: Perfect for students, artists, designers, architects, engineers, mathematics, network engineering, fractional measurement, contractors, school learning and more. Drawing template: Construction template, curve template, circular template, ellipse template, geometric drawing template, mechanical template, mathematics learning template, multi-functional drawing template and so on. You can choose randomly. Specifications: Material: Plastic Type: 001, 002, 003, 004, 005, 006, 007, 008, 009, 010, 011, 012, 013, 014, 015, 016, 017, 018 Color: Yellow Note: 1.Please allow 1-2cm error due to manual measurement, please make sure you do not mind before ordering. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Please refer to the picture for the detailed size. Package includes: 1pc ruler