This image of the United nations flag is in the Public Domain and can be used freely. If you use it on a webpage, a link to http://ourworldflags.com/United nations would be very much appreciated.

This foreign national flag of United Nations is made of 100% nylon. The flag has a fully printed seal. (Sku#: 1423) United Nations - 3'x5' Click to Enlarge Price: $37.