[Multipurpose template]Using these rulers, you can paint geometric patterns like different sizes of circle,ellipse,square,triangles,hexagons and so on which are handy drawing helpers.The corner of the ruler is designed with radian to avoid hurting your hands,it is also a learning tools for children to learn to draw. [Wide application]They work well in architecture, network technique,fractional measurement,art design or as drawing templates for school learning. [Rulers measurement]Use metric system and take centimeter as scale unit;These drawing templates have differences in size,the length ranges from 17.8 to 25 cm/ 7 to 9.84 inches,the width ranges from 9.4 to 14.7 cm/ 3.7 and 5.8 inches. [Green material]Made of quality plastic,durable and lightweight. [Package]Including 9 pieces of drawing templates(as the photo show) in different designs,meet your different needs for daily usages.