You write the letter, fold it, lick some gummed flaps ... Later geniuses even invented ways to vary the sizes of the envelopes in production. During the Civil War the Confederates had trouble ...

In a digital age dominated by emails and instant messages, the timeless art of letter writing continues to hold a special ...

Letters sent by First Class Mail (1 oz ... How many stamps do I need for a large envelope 2021? A 1 ounce legal-size envelope mailed within the US requires two forever stamps, of which one is worth a ...