In this article, we will break down the weight limits of popular USPS services on our platform to save you time searching. The maximum USPS accepts for mailable parcels is 70 lbs (31 kg), but it can be a lot lower, depending on the service.
| USPS Service | Weight limit (lbs) |
| USPS - Ground Advantage | 70 lbs |
| USPS - Priority Mail | 70 lbs |
| USPS - Priority Mail Flat Rate Small Envelope | 4 lbs |
| USPS - Priority Mail Flat Rate Legal Envelope | 70 lbs |
| USPS - Priority Mail Flat Rate Padded Envelope | 70 lbs |
| USPS - Priority Mail Flat Rate Large Envelope | 70 lbs |
| USPS - Parcel Select | 70 lbs |
| USPS - Flat Rate Priority Mail International - Large | 70 lbs |
| USPS - Flat Rate Priority Mail International - Small | 70 lbs |
| USPS - Priority Mail Flat Rate Box | 70 lbs |
| USPS - Priority Mail Express | 4 lbs |
| USPS - Priority Mail Express Flat Rate Envelope | 20 lbs |
| USPS - Priority Mail International | 20 lbs |
| USPS - Priority Mail International Flat Rate - Small | 4 lbs |
| USPS - Priority Mail International Flat Rate - Medium | 70 lbs |
| USPS - Priority Mail International Flat Rate - Large | 4 lbs |
| USPS - Priority Mail International Flat Rate - Envelope | 70 lbs |
| USPS - Priority Mail Express International | 4 lbs |
For more information on USPS weight limits, we suggest visiting the USPS Sending Packages page.