Size: about 180x76mm / 7.08x2.99in, easy to use and carry As a mathematics home and for students who want to start learning and drawing math Clear color allows you to see the words, letters and number on the page through the protractor Suitable for use in school,, home, or on the go This geometry set is perfect for students, teachers, math experts, architects, engineers, artists and so on Ruler set of learning tools can meet daily learning and life needs