Primary Science Jumbo Magnifiers Observe on a grand scale with our extra-large magnifiers, sized perfectly for small hands. Ideal for taking a closer look at critters, rocks, fabric, and so much more! Flip-out stands on each magnifier allow for engaged, hands-free viewing. Each magnifier's plastic lens measures 4.5" in diameter and offers 4.5x magnification. Magnifiers measure 8"L.