If your mail matches the required dimensions for USPS’s Flat Rate Priority Mail service, great. Bear in mind that boxes and envelopes ship within two to eight days of ordering.

This means, if you so choose, you can order free packaging from USPS, then use it to ship your mail with a completely different delivery service. However, the actual Flat Rate boxes and envelopes are free.

The costs above apply to shipping with USPS. To put that in perspective, here are some things that weigh about 70 lb: There’s a weight limit of 70lb for all packages shipped via USPS Flat Rate. (Be aware that Post Office pricing is the same as purchasing online): Packaging USPS Flat Rate Envelope Shipping PricesĬurrent USPS Flat Rate Priority Mail envelope prices are: PackagingĬurrent USPS Priority Mail Flat Rate box prices are as follows.

If you’re not familiar with costs for USPS Flat Rate postage and packaging, read on. The service simplifies calculating the costs of mailing your clients and customers, and saves you time and money by reducing the administrative burden of sending your business mail. USPS Flat Rate is one of the best value postage shipping solutions.

Shipping flat rate usps