Mesta Emperador Dark Marble mosaic tiles can potentially make a room look bigger, depending on various factors such as the size, pattern, and placement of the tiles. Marble tiles, in general, have a reflective surface that can help to create a sense of depth and openness in a space. Additionally, the dark color of Emperador Dark Marble can add a sense of sophistication and elegance to a room. However, the overall effect on the perception of room size may vary depending on other elements in the room, such as lighting, furniture arrangement, and overall design scheme.