1.A multifunctional ruler can be used as a simple compass. 2.Ergonomics design, convenient to take and us. 3.One multiuse ruler includes protractor, Y-axis, X-axis, circle-drawing hole with radius mark, arc, short-drawing slot, movable short ruler, elliptical hole, parallelogram, parabola, built-in 30 degree right triangle, equilateral triangle, straightedge. 4.Suitable for students, kids, children. 5.Easy to carry and keep. Size: Product Size: (L x W ) 7.5 x 3 inches (Primary School ) Product Size: (L x W ) 8 x 3.3 inches (Junior &High School) colour: transparent + blue Material: plastic Package Contents: 3 x Template Ruler 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.