Measuring range: protractor measures 0 to 180 degrees left to right & right to left; Protractor with inch & centimeter marks makes measuring easy. Size & material: the size of the plastic protractor is 6 inch, color is translucent; With hollow center, the student protractor is easy to grip. Use easily: you can use the geometry protractors to get the angle & length quickly; Easy to carry in bag, pencil case, math tool case, backpack, etc. Colors may vary. Sanford Colorific 6 Inch Translucent Plastic Ruler/Protractor | Colors May Vary