People are now able to enjoy playing their favourite videogames on different types of devices. In this paper, we investigate the influence on players’ game immersion level by changing the size of the touch screen device used. We use two different sizes of touch screen device, iPod Touch and iPad, and let people play videogames on it, measuring their immersion level. We find that the level of immersion is higher for the larger touch screen size in comparison with the smaller one. The overall picture is therefore clear and suggests that different sizes of touch screen could be an important factor to influence immersion in videogames.