We offer wall posters covering a variety of scientific subjects, especially those related to gems, minerals, and fossils; although others also. Excellent for the classroom, summer activity groups, or any enthusiast of of these subjects. Each poster offers a comprehensive overview of the subject through magnificent illustrations (the posters look better in person than in these photographs) and text filled with many facts and recent theories. they are printed on a heavy white stock, and then coated to provide a satin finish. these are the same high standards used to produce expensive art prints. they are a large 24 x 36 inch size, which fits standard picture frames. they also come in a plastic-laminated form, which is Excellent for those who want a tough poster without bothering with a frame. stick-on wall hangers are available that allow easy installation of the poster (best used with the laminated form).