Features: Round protractor is thick and practical and not easy to break. 360 degree circle measuring tool, with a protractor to draw the desired figure. The protractor is highly transparent, easy to read the centimeter scale on the ruler, and easy to measure. Full round protractor can be used in homes and offices, students and teachers in schools. Multifunctional circle template is suitable for painting, measuring, homework, technical drawing and so on. Specifications: Component: Plastic Outer Diameter: about 34.5cm/13.58'' Inner Diameter: about 25cm/9.84'' Package Includes: 1 Pc Round Protractor note: Please allow 1-3cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.