Envelopes must be rectangular and made of paper to qualify for letter prices. Your envelope can be a maximum of 11-1/2" long x 6-1/8" high. (A standard No. 10 envelope is 9-1/2" long x 4-1/8" high.) …

Apr 11, 2026 · This 2026 USPS guide shows the correct way to address an envelope, including where to put the return address, how to format the recipient's address, and the exact spot for your postage …

Feb 24, 2025 · Learn how to mail letters in the U.S. with USPS. From addressing and postage to tracking, certified mail, and international shipping—step-by-step guide.

Feb 19, 2026 · Sending a letter in the mail is super easy—all you need is the right envelope and postage stamp. Whether you’re writing a message to your pen pal or sending an important business …

Step-by-step mail letter format—USPS basics, sender address, inside address, subject line, closing, and envelope rules for professional letters.

Nov 19, 2025 · The U.S. Postal Service has guidelines for how addresses should be written — whether you're sending something across town or overseas. Following these tips makes it easier for postal …

Make sure to identify which type of address you want to mail to and follow the correct format accordingly. PostGrid makes it easy for businesses to capture valid, deliverable addresses.

Learn how to correctly write domestic, international, military and PO box addresses for shipping with UPS.

Before you are ready to mail a letter, you must first construct the letter. When it comes to writing, especially for professional purposes, many people wonder where to begin. The content of the letter …

Sep 21, 2023 · How to write a mailing address is determined by the mailing address format of your country, the destination country, and the type of address you're sending to. We’ll cover the steps to …