4 3/8" opened. Compact 3x power slide-out magnifier with a protective plastic sleeve. The built-in LED light makes it perfect for use in the dark, turns on when opened. Its crystal-clear 3x acrylic lens gives you a sharp, distortion-free view. Great for reading maps and other fine print. Perfect for all needlework and crafts. Fits easily into pocket or purse. Uses three AAA batteries (not included). Weighs 1.6 oz. Hang packaged.