Bing found the following results
Flags of the World | Flagpedia.net
FLAG | English meaning - Cambridge Dictionary
Country flags of the world (list of all 254) | Flagpedia.net
Flag - Wikipedia
Flags of the World - Worldometer
Flag | Origins, Forms, & Functions | Britannica
World Flag Database: Welcome
World Flag Chart
National flags of the world by continent | Flagpedia.net
Flag - Colors, Symbols, Designs | Britannica