DM-2.5 Dome Magnifying Glass with 2.5" Inch diameter and 4x magnification. This Dome Magnifier is easy to use and has 2.5" Inch diameter (medium size) and 4x magnification, just place the magnifier on a flat surface for 4x magnification ideal for magnifying newspapers, charts, paperwork, books, financial and accounting statements and documents. Simply place the Dome magnifier on the surface and glide across to easily view with 4x magnification, the bottom of dome magnifiers is slightly concave to prevent scratching. Acrylic Dome Magnifiers will not crack and chip like cheaper glass dome magnifiers, and ours also have higher magnification. We use the high optical grade acrylic and our Domes are hand finished to provide the best clarity and polishing.