5 in. x 8 in. Make reading the enjoyable experience it should be. Read a complete line on a page clearly - enhanced by 1.5x magnification. 1/2 inches x 6 inches wide opening line; 5 inches x 8 inches size typoscope. Made of sturdy, long-lasting black plastic. Great for low vision persons. Shows only the printed line - reducing distraction from the other printed lines on the page.