This LumiDome Plus is a 3X power ball-shaped, polished acrylic dome magnifier. Its pre-focused lens allows ambient light to illuminate the subject for bright, clear viewing. Solid unbreakable construction is safe for use in home, office or school. Perfect for reading books, map reading, viewing photos or reading any fine print. Also makes a handy paperweight! Measurements: 2-1/2" across the base and 1-1/2" tall.