Mailing Cards: Calculating Postage + Tips for Troublesome/Embellished Cards
What is USPS First Class Mail? Shipping First Class Mail Explained
USPS- First class vs. priority mail
Know What You’re Mailing: Letters vs. Flats vs. Parcels
How To Mail USPS First Class Envelopes & Packages with Stamps
How USPS Sorts Mail
What happens to your letters when the USPS picks them up?
DIFFERENT TYPES OF USPS FLAT RATE ENVELOPES! | eBay Shipping
HOW TO ADDRESS A PACKAGE
US Forever STAMP Maximum Weight & Dimensions Allowed COST Per Additional Ounce Letter 1st Class Mail
Comparison of FedEx, USPS and UPS Overnight Envelopes, Boxes and Tube
Good Question: How does the post office deliver mail?
Confusing new blue mailboxes
How mail agencies identify suspicious packages
USPS test: We mailed 4 packages with GPS trackers to see how quickly they got there
How USPS certified mail works!
Postal Service Mail Sorters, Processors and Processing Machine Operators
How To Send USPS Certified Mail and Return Receipts
Letters Without Envelopes
How to use the automated self service kiosk at the US postal service