Size

The easiest way to find out what size you should have on your new screen is to project the image on the wall where you intend to place the screen, try different sizes and when it feels right, measure and buy a screen closest to the measurement. Most people feel comfortable when the width of the screen is about half of the distance between the screen and where you are sitting. If you are about 4 meters from the screen it should be about 2 meters wide.