Thoughtful and considerate design: the drawing circles template tool has a rotating dot design, you can easily draw a circle with it, and at the same time, there are some rotating dots on the ruler, helping you draw circles of different diameters, convenient to use Multiple practical functions : these geometric rulers can not only draw basic lines, circles, rectangle, triangle, but also can draw cylinder, cone, parabola, angular bisector and other functions, can meet your different needs in daily use, and it is easy to slide, stable drawing, not easy to skew, easy to measure Different sizes to choose: these geometric template drawing rulers have sizes, the circle geometric ruler is . 11.5 cm/ 4.53 inches in diameter, providing you with a proper size to draw a circle; The drawing ruler for primary school students is . 19 x 7.7 cm/ 7.48 x 3.03 inches, the drawing ruler for junior and senior students is . 19.8 x 8.3 cm/ 7.8 x 3.27 inches Assorted places to use: these geometric template rulers for kids can be served in many places, such as schools, classrooms, painting, teaching, offices and so on; They are also suitable for artists, students, pattern makers, designers, DIY enthusiasts and many others A good combination to meet your needs: there are 4 pieces of plastic geometric rulers in the package in total, comes in blue, which looks bright and classic, having 3 different sizes for kids of different ages; They are equipped with detailed scale, clear proportion, is a good helper to read dimension information directly and efficiently Colour: blue Material: plastic Package Contents: 4 x Plastic draft rulers for school Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.