These angle measurement protractors can be applied for home and office using, school students and teachers. It is very convenient to use, and it is good for completing your work, and a great for kids. Besides, it's also an essential tool for any toolbox. The black numbers are clear and easy to identify, then you can read quickly with great accuracy. Feature - ColorTransparent - Material: Plastic. - Size: 10.00X5.50X0.02cm/3.93X2.16X0.01in Note: Pattern - 50 Pack protractors: the material is plastic; The bottom side length is 10 cm, 4 inch size make it easy to put on your books, notebooks and pencil case. - Measure protractor with accurate number: the black numbers are clear and easy to identify, then you can read quickly with great accuracy. - Half round shape: the plastic protractors are shape protractor, it's universal, you can applied to settle the math problems frequently. - Thick and protractors: this clear plastic protractor is thick enough, thus they are not easy to snap. - Measure math tool: the geometry protractors are suitable for painting, measure, homework, technical drawing; Abundant bulk, you can send them to your friends and classmates. Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: protractor