Endicia

This covers the following services for the USPS: 1. Express Mail 2. Priority Mail 3. First Class Mail & Packages

For shipping Express & Priority Mail, here are the following criteria the Post Office has:

   Maximum size is 108" in combined length and girth (distance around the thickest part).

If your item is larger, you'll need to take it to a Post Office™ and ship with our Standard Post™ service. Contents for Priority Mail Express, Priority Mail, or Media Mail must weigh less than 70 lbs. First-Class Mail packages must weigh less than 13 oz.

If you’re using USPS’ free Priority Mail Express and Priority Mail Flat Rate supplies, the container flaps must be able to close within the normal folds when sealing the box.

Phone number For USPS Customer Support: 800-275-8777