High Quality: These stencils are made of durable, lightweight, high-quality plastic. The clear green color is easy on the eyes. Practical Set: This set includes 11 clear green plastic geometric stencils in various shapes and a zippered pouch for convenient storage and portability. Metric Measurements: Uses the metric system with centimeters as the unit of measurement; the 11 stencils vary in size, ranging from 17.8 to 25 cm in length and 9.4 to 14.7 cm in width. 11 Stencils Included: 1 curve stencil, 1 network engineering stencil, 1 geometric stencil, 1 mechanical stencil, 1 nut stencil, 1 building stencil, 1 math learning stencil, 1 circle stencil, 1 multi-functional stencil, 1 ellipse stencil, 1 orthographic stencil. Wide Application: Perfect for architecture, mathematics, network engineering, fractional measurement, art design, or school learning.