The following picture shows what jody observes when she uses a lens to look at a stamp. what happens to light passing through a lens that causes the figure of the stamp to appear than the real stamp?

When the light bounces off an object and travels to your eyes those light rays travel parallel to each other. When they pass through a magnifying glass, the Convex lens finds the parallel rays so that they converge and create a virtual image on your eyes retinas. The virtual image on your retinas appear larger than the real object due to principles of Geometry. Despite the magnifying glass, your eyes trace the light rays back in parallel lines to the virtual image. Since the virtual image is farther from your eyes than the object is, the object appears bigger.