In the case of a letter sent First Class Mail, there is a $0.25 charge per additional ounce. 20 cents, up from 20 cents in 2020. Padded Flat Rate Envelope $8.75 Commercial Base $9.30 at Post Office & ...

In essence, there is only one main difference between flat rate and Priority Mail: the price. All of your shipments are shipped in Flat Rate Boxes. Shipping with Flat Rate Boxes is a breeze. As long ...

Small Flat Rate Box; 8-5/8″ x 5-3/8″ x 1-5/8″ Inside 8-11/16″ x 5-7/16″ x 1-3/4″ Outside $11.00 $11.35 Medium Flat Rate Box; 11″ x 8-1/2″ x 5-1/2″ Inside11-1/4″ x 8-3/4″ x 6 ...

The price of a Priority Mail flat rate envelope (size 12-1/2″ x 9-1/2″) will jump from $10.45 to $10.78 while the Priority Mail Express flat rate envelope (size 12-1/2″ x 9-1/2″) will jump ...

The USPS has raised shipping rates and lowered its 2025 on-time mail delivery targets. Find out how these changes impact your ...