Description : ...... In 2007, the U.S. Postal Service issued the FOREVER STAMP, which will always be valid as First-Class postage on standard envelopes weighing one ounce or less, regardless of any subsequent increases in the First-Class rate. The U.S. flag flies high with stars and stripes! Each stamp represents an important theme in America's development as a nation: Freedom, Liberty, Equality, and Justice.