Everything You Need to Know About TV Screen SizesModern TVs generally range between 32 and 115 inches. How to Measure a TV and Figure Out What Size You NeedThe goal of measuring a TV (and/or the space where you want your TV to go) is to figure out the screen size that suits your space. After determining the space available for your TV, measure the distance from the TV to the front of your couch, chair, or seating area. Based on SMPTE's recommendation, the distance between you and your TV should be approximately 3 times the height of your TV screen. You can also use a handy screen distance calculator to find the perfect match by plugging in either a screen size or viewing distance.