Pirate Ship

The Priority Mail Medium Flat Rate Box and Large Flat Rate Box are up to 58% more expensive than using your own box

Why you shouldn't use Medium or Large Flat Rate Boxes

Learn what qualifies for Media Mail® and how to access it

How do you use the USPS Media Mail® shipping service?

Learn about this "secret" dimension-based USPS shipping service that's perfect for sending small and heavy packages

What is Priority Mail Cubic?

See the 6 free "mailing boxes" from USPS that you can use with weight-based Priority Mail or Priority Mail Cubic

Free USPS Mailing Boxes for Priority Mail Cubic

Learn how you can use USPS Priority Mail Cubic Softpack as a cheap & fast way to ship envelopes or poly mailers

Can I use Priority Mail Cubic with a softpack or padded envelope?

Understanding USPS® "non-standard" fees that some packages may be subject to

USPS Nonstandard Fees

A quick guide on size & weight restrictions for shipping with USPS

Maximum size and weight limits for USPS® services

Understanding USPS and UPS surcharges for large but lightweight shipments

What is Dimensional (DIM) Weight pricing?

Learn why you might see existing tracking data for a different package when you enter your tracking number on the USPS website

Why does my USPS label have an old tracking number?

Here are lists of items that are illegal to ship with the Postal Service (for both domestic and international destinations)

USPS: Prohibited Items

Some USPS and UPS packages can be intercepted and returned to you before they're delivered

How to intercept or return a package

Learn what your cheapest shipping option is for sending a poster on Pirate Ship

Cheapest way to ship posters

The USPS® Electronic Delivery Confirmation program (E-DELCON) provides full package tracking to certain countries.

List of countries with USPS® E-DELCON international tracking

Learn how USPS confirms that the correct amount of postage has been purchased, and adjusts your account for any differences.

What is the USPS APV Automated Package Verification System?

Learn why Pirate Ship doesn't sell USPS® First Class Mail International Flats or other mailing services

Does Pirate Ship offer stamps or postage for mailing letters or flats?

Learn some simple rules of thumb about which USPS shipping services will save you the most money

The cheapest ways to ship with USPS®

Learn about Priority Mail shipments that don't qualify for Priority Mail Cubic...and are sometimes cheaper!

What is weight-based Priority Mail?

Learn about Priority Mail flat rate postage and why it's often cheaper to use your own packaging and ship with a different service

Do I need to use a Priority Mail® box if I buy a Priority Mail® label?

Learn about the shipping services and rates that USPS® offers.

USPS® Shipping Services

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