The sizes are 1920×1080, 1680×1050, 1600×900, 1600×1200, 1280×1024, 1024×768 and 800×600 (640×480 supported only from Windows 8).
Nevertheless, EA could have included a few more wallpapers to enrich the video game theme (but it wouldn't be difficult to create new wallpapers if and when needed by users).
Furthermore, we noticed that the 'Desktop Music' has several clashes with the wallpaper.
Desktop 50e0806aeb wilibel