Atlasgeo: Belgium: Animated GIF image.
Flags of the World: Belgium: National, subnational, military, and historical flags and ensigns, as well as related laws and regulations.
Theodora.com: Belgium Flags: Images in several sizes and links to country facts.
Theodora.com: Flag of Brussels: Images in several sizes.
Theodora.com: Flag of Flanders: Images in several sizes.
Theodora.com: Flag of Wallonia: Images in several sizes.
World Flag Database: Belgium: National flags and ensigns, and flags of the regions and communities.