Features: High-Quality Materials: Geometric drawing templates are made of high quality plastic, durable and lightweight, various shapes allows you to draw different patterns you want, wonderful handy drawing helpers. Wide Applications: Geometric rulers are for ideal for art design, fractional measurement, building formwork, architecture, network technique and drawing templates in shool, office, home. Great help for students and children. Rulers measurement: Adopt metric system, use centimeter as scale unit, the minimum accuracy is 1mm. Drawing templates are vary in sizes. Great gift: Perfect for students, artists, designers, architects, engineers, mathematics, network technique, fractional measurement, Contractors, school learning,and more. Drawing template: Building template, Curve template, Circular template, Ellipse template, Geometric drawing template, Mechanical template, Mathematics learning template, Multifunctional drawing template and so on. You can choose random. 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 errors due to manual measurement, make sure that you do not mind before you order. 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: 1 Piece Ruler